V, BULLETIN OF THE BRITISH MUSEUM NATURAL HISTORY ENTOMOLOGY Vol. XII 1962 PRINTED BY ORDER OF THE TRUSTEES OF THE BRITISH MUSEUM (NATURAL HISTORY; LONDON : 1963 DATES OF PUBLICATION OF THE PARTS No. 1-17 April 1962 No. 2-17 April 1962 No. 3-29 May 1962 No. 4-17 July 1962 No. 5-17 July 1962 No. 6-17 July 1962 No. 7-10 August 1962 No. 8-26 October 1962 Contents & Index January 1963 PRINTED IN GREAT BRITAIN AT THE BARTHOLOMEW PRESS DORKING BY ADLARD AND SON, LTD. CONTENTS ENTOMOLOGY VOLUME XII PAGE No. I. The British Pseudococcidae (Homoptera : Coccoidea). By D. J. WILLIAMS i No. 2. New African Caddis-flies (Order Trichoptera) . By D. E. KIMMINS 81 No. 3. Notes on the Epitolinae with descriptions of a new genus and new species and subspecies (Lepidoptera : Lycaenidae). By T. H. E. JACKSON 123 No. 4. A revision of the African Laemophloeinae (Coleoptera : Cucujidae). By L. P. LEFKOVITCH 165 No. 5. Microlepidoptera from the New Hebrides. Records and descriptions of Microlepidoptera collected on the Island of Aneityum by Miss Evelyn Cheesman, O.B.E. By J. D. BRADLEY 247 No. 6. The Acridoidea (Orthoptera) of Madagascar. I. Acrididae (except Acridinae). By V. M. DIRSH 273 No. 7. Notes on Tunga caecigena (Siphonaptera : Tungidae). By KARL JORDAN. Neotunga euloidea gen. n., sp. n. (Siphonaptera : Pulici- dae). By F. G. A. M. SMIT 351 No. 8. Holarctic sawflies (Hymenoptera : Symphyta). By ROBERT B. BENSON 379 THE BRITISH PSEUDOCOCCIDAE (HOMOPTERA : COCCOIDEA) D. J. WILLIAMS BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) ENTOMOLOGY Vol. 12 No. i LONDON: 1962 THE BRITISH PSEUDOCOCCIDAE (HOMOPTERA : COCCOIDEA) BY D. T. WILLIAMS j (Commonwealth Institute of Entomology) i '- Pp. 1-79 / 29 Text-figures BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) ENTOMOLOGY Vol. 12 No. i LONDON: 1962 THE BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY), instituted in 1949, is issued in five series corresponding to the Departments of the Museum, and an Historical Series. Parts will appear at irregular intervals as they become ready. Volumes will contain about three or four hundred pages, and will not necessarily be completed within one calendar year. This paper is Vol. 12, No. I of the Entomological series. The abbreviated titles of periodicals cited follow those of the World List of Scientific Periodicals. Trustees of the British Museum, 1962 Issued 17 April 1962 Price Twenty-eight Shillings THE BRITISH PSEUDOCOCCIDAE (HOMOPTERA : COCCOIDEA) By D. J. WILLIAMS SYNOPSIS This study of the British Pseudococcidae has necessitated changes in nomenclature of many of the 42 species discussed, resulting in new combinations and new synonymy of names. The species are placed in 21 genera, one of which, Balanococcus, is described as new. Twenty -eight species are regarded as native and the remainder are found in greenhouses. Four new species are described : Atrococcus cracens, Balanococcus boratynskii, Saccharicoccus penium and Trionymus orestes. Illustrations are given of 29 species, the others having been illustrated elsewhere by other authors. INTRODUCTION THE British Pseudococcidae or mealy-bugs discussed here were included in the sub- family Dactylopiinae by Newstead (1903) and later by Green in various accounts of the British species. The group is equivalent to the tribe Pseudococcini as defined by Balachowsky (1948) or to the subfamily Pseudococcinae recognized by Borchsenius (1949). In the present work the group is recognized as that defined by Ferris (1950) as the family Pseudococcidae. HISTORY Very few mealy-bugs were known from Britain in the last century and about half of these had been described from greenhouses. One in particular, collected in a green- house at the Royal Botanic Gardens, Kew, has still not been found in its natural habitat. The first native record seems to be that of Coccus hcdophilus described by J. Hardy in 1868. Towards the end of the century J. Douglas added other names to the British list but it was R. Newstead who first collected this group seriously. In a monograph of British coccids, Newstead (1903) gave descriptions of 12 mealy-bugs, 7 of which were native species. During the present century E. E. Green was the one most active in this field adding many new records and describing 15 British species as new to science. The inadequacy of existing descriptions of British Pseudococcidae makes it impos- sible, except in a few instances, to identify species from the literature with any degree of certainty. This also applies to many species described from the Continent, although in recent years some effort has been made to describe them more fully. The purpose of this study is to redescribe and illustrate the British Pseudococcidae and to bring together the somewhat scattered records. Particular attention has been given to a work by Borchsenius (1949) revising the species from Russia. In this work 80 are described as new and many others have since been described from that area. Many of the Russian species will doubtless be found in Western Europe and, ENTOM. 12, I. I 4 D. J. WILLIAMS taking as a guide the frequency of new species recently discovered in Western Russia, it would seem safe to assume that many new ones remain to be discovered in Western Europe and even in Britain. When some of the continental species are known to be identical with those described here then their names have been reduced to synonyms. On the other hand a number of the British names may have to be sunk when the continental species are redescribed. Holotypes of the four new species are deposited in the British Museum (Natural History). GEOGRAPHICAL DISTRIBUTION The species settled on for discussion are given in the distributional list opposite. Newstead and Green often recorded species as British merely because they had been collected alive on imported plants. In recent years Ferrisiana virgata (Cockerell) and Dysmicoccus brevipes (Cockerell), two important cosmopolitan species, have found their way into this country but no records of their establishment are known here. A few species, especially some members of the genera Pseudococcus and Rhizoecus, have become established in greenhouses throughout the country and for purposes of recognition they are included. Some other greenhouse species are discussed where changes in nomenclature are due or where a redescription will save the species from obscurity. No original material seems to exist of Dactylopius theobromae described by Douglas (1889) and it is impossible to recognize it from the meagre description : the name, therefore, must be regarded as a nomen dubium. Although normally regarded as part of the continental fauna, the mealy-bugs of the Channel Islands are included because, of the 9 species now recorded, all but 3 are known to occur in Britain. The paucity of records from Wales, Scotland and Ireland immediately becomes apparent from the list. This is undoubtedly due to a lack of collecting and when the total number of British species is finally known, these areas will probably have the most interesting and varied fauna. The British records included relate only to specimens actually studied during the course of this work. MORPHOLOGY All morphological terms mentioned are based on those used by Ferris (1950, 1953). McKenzie (1960) has given an excellent generalized drawing representing the morpho- logical structures of the family Pseudococcidae. Measurements of the labium refer to the two fused and sclerotized segments constituting the cone. The small basal segment is not included. As pointed out by McKenzie, the presence of a denticle on the claw, although a useful character, is now of less significance in placing a species in the Phenacoccus series. Some species are now known with a denticle but which are not typical of this series and others have been described recently with an obvious relationship to the Phenacoccus series, yet lack the denticle. One species is described here as Euripersia europaea (Newstead) from specimens where the denticle is present or entirely lacking. THE BRITISH PSEUDOCOCCID AE Distributional List of the British Pseudococcidae Antonina crawi* Atrococcus cracens sp. n. . A. luffi .... A . paludinus . Balanococcus boratynskii sp. n. B. scirpi Chnaurococcus subterraneus Chorizococcus lounsburyi* Dysmicoccus walkeri D. wistariae* . Euripersia europaea E. tomlinii Heliococcus minutus Heterococcus pulverarius . Nipaecoccus nipae* . Peliococcus balteatus. Phenacoccus aceris , P. interruptus P. sphagni Planococcus citri* Pseudococcus adonidum* . P. fragilis P. latipes* Rhizoecus albidus R. cacticans* . R. dianthi* R. elongatus* . R. falcifer* R. halophilus . Saccharicoccus penium sp. n. Spilococcus cactearum* S. filicicola* Spinococcus calluneti Trionymus dactylis . T. diminutus . T. newsteadi . 7". orestes sp. n. T. perrisii T. phalaridis . T. radicum T. thulensis T. tomlini W x X X X X X X X X X X X X X X X X X X X X X X X X X X X X X a d a "o & X 62 X X Other localities Japan, Formosa, U.S.A., Hawaii, France, Russia. S. Africa, Kenya, Egypt, Hawaii, U.S.A. Holland. Spain, France, Germany. Japan, U.S.A. Holland, Germany. Corsica, Germany. Spain. Probably cosmopolitan. Russia, Sweden, Czechoslovakia. Palaearctic and Nearctic. Holland. Cosmopolitan. Cosmopolitan. Cosmopolitan. Probably cosmopolitan. France, Germany. North and South America, green- houses in Germany. Holland. Probably cosmopolitan. U.S.A., Mexico, greenhouses in Europe. Sweden, Germany, Russia, Czechoslovakia. France. New Zealand, U.S.A., Russia, Formosa, Italy. Germany, Russia, Czechoslovakia. France, Germany , Russia, Holland. Russia. Holland. Iceland, France. * Greenhouse species. 6 D. J. WILLIAMS ACKNOWLEDGEMENTS The writer is grateful to Dr. Harold Morrison of the United States Department of Agriculture, Washington, D.C. for the prompt and generous way he has answered queries, studied specimens submitted to him and given helpful advice. His highly valued opinions on many of the species herein discussed are accepted and included. Professor H. L. McKenzie of the University of California, Davis, California has co-operated fully in discussing many points of interest and giving the writer valuable information on his latest paper on the Californian mealy-bugs before it was published. His kindness in this respect has been most welcome. Professor N. S. Borchsenius of the Zoological Institute, Academy of Science of the U.S.S.R., Leningrad, has kindly examined a photograph of the illustration of Balanococcus scirpi (Green) and given valuable comments on its relationship to the genus Kiritshenkella described by him. He also compared specimens of Trionymus hibernicus with Russian specimens of T. perrisii for which the writer is deeply indebted. Dr. A. Reyne of the Zoologisch Museum, Amsterdam, Holland, kindly made available Dutch specimens of Trionymus perrisii and T. radicum for which thanks are cordially given. Particular gratitude is expressed to Dr. K. L. Boratynski of Imperial College, London, who has taken a lively interest in this study since its commencement. Dr. Boratynski has made available his collection of British mealy-bugs, adding many new records and two new species which are described herein. His help and encourage- ment have been much appreciated. KEY TO GENERA 1 Legs entirely lacking ANTONINA Signoret Legs present, although at times reduced in size ...... 2 2 Trilocular pores present somewhere on the body ...... 3 Trilocular pores absent, replaced by quinquelocular pores HE TERO CO CCUS Ferris 3 (2) With some crateriform ducts present, each with the orifice at the apex of a sclerotized prominence and often with one or more setae attached to the base of the duct prominence HELIOCOCCUS Sul9 Without this type of duct .......... 4 4 (3) With some dorsal body setae spine-like and same size or nearly same size as those of cerarii ........... 5 Dorsal body setae never enlarged and spine-like, either slender or minutely lanceolate ............ 6 5 (4) Quinquelocular disc pores present on venter, claw with a denticle, dorsal cerarii present SPINOCOCCUS Borchsenius Quinquelocular disc pores absent, claw without a denticle, dorsal spine-like setae not forming cerarii NIPAECOCCUS Sul9 6 (4) Dorsal multilocular disc pores present, arranged in clusters of 3-6 and with a minute tubular duct at the centre . . . PELIOCOCCUS Borchsenius Dorsal multilocular disc pores, if present, not arranged in clusters . . 7 7 (6) Oral rim ducts present somewhere on the body ...... 8 Oral rim ducts lacking ..........12 8 (7) With 17 pairs of cerarii, each possessing slender auxiliary setae in addition to cerarian setae PSEUDOCOCCUS Westwood THE BRITISH PSEUDOCOCCIDAE 7 With 0-17 pairs of cerarii but only anal lobe pair with auxiliary setae . . 9 9 (8) Body content black or blue-black, especially apparent when boiling in potash or lacto-phenol ............ u Body content never black or blue-black, usually yellow . . . . 10 10 (9) With from o to 4 pairs of cerarii present . . CHORIZOCOCCUS McKenzie With from 6 to 17 pairs of cerarii present, part of . SPILOCOCCUS Ferris 11 (10) With 1-7 pairs of cerarii, circulus absent . . . ATROCOCCUS Goux With at least 9 pairs of cerarii, circulus present, part of .SPILOCOCCUS Ferris 12 (7) Circulus present, longer than wide, hour-glass shaped SACCHARICOCCUS Ferris Circulus, if present, never longer than wide or hour-glass shaped . . . 13 13 (12) With a denticle or tooth, either well developed or small, on the plantar surface of the claw ............ 14 Claw without a denticle .......... 15 14 (13) With 9-1 8 pairs of cerarii .... PHENACOCCUS Cockerell With 2-4 pairs of cerarii, part of .... EURIPERSIA Borchsenius 15 (13) Anal lobes without recognizable cerarii, bi- or tritubular pores present somewhere on the body RHIZOECUS Kiinckel d'Herculais Anal lobes with cerarii represented by paired conical setae, bi- or tritubular pores lacking ........... 16 16 (15) With 18 pairs of cerarii PLANOCOCCUS Ferris With 1-17 pairs of cerarii ......... 17 17 (16) With 6-17 pairs of cerarii DYSMICOCCUS Ferris With 1-5 pairs of cerarii .......... 18 1 8 (17) With some quinquelocular pores on venter, part of EURIPERSIA Borchsenius Never with quinquelocular pores on venter . . . . . . . 19 19 (18) Antennae 7-8-segmented TRIONYMUS Berg Antennae 6-segmented . . . . . . . . . .20 20 (19) Multilocular disc pores forming marginal zone around dorsum and venter BALANOCOCCUS Williams Multilocular disc pores on venter of abdomen only, not forming marginal zone CHNAUROCOCCUS Ferris NOTES. Although the key is based mainly on morphological characters some difficulty may be encountered with couplet 9 (8) when identifying specimens already prepared on slides. This is due to our incomplete knowledge of the genera Chorizo- coccus, Spilococcus and Atrococcus and further discussions are given under these genera. DESCRIPTIONS OF SPECIES ANTONINA Signoret Antonina Signoret, 1875 : 24. Antonina Signoret, Borchsenius, 1949 : 311. Antonina Signoret, Ferris, 1953 : 289. Type of genus Antonina pur pur ea Signoret. The type of the genus was described from France but the genus is represented mainly in the warmer regions. Only Antonina crawi Cockerell is known in this country and this is found in greenhouses. It is mentioned here to synonymize the name A . socialis Newstead. All members of this genus are devoid of legs and many have the posterior segments of the abdomen sclerotized at maturity. They are found only on grasses. 8 D. J. WILLIAMS Antonina crawi Cockerell Antonina crawi Cockerell, 1900 : 70. Antonina socialis Newstead, 1901 : 85 (syn. n.). Antonina socialis Newstead, Newstead, 1903 : 207. Antonina crawii Cockerell, Ferris, 1953 : 292. The type of Antonina socialis is identical with A. crawi. Specimens are at hand from ENGLAND, Hertfordshire, Broxbourne, Arundinaria japonica, 26.1.1899 and SCOTLAND, East Lothian, Prestonkirk, on bamboo, 11.1905, all taken under glass. Ferris has redescribed and illustrated this species. ATROCOCCUS Goux Atrococcus Goux, 1941 : 69. Type of genus Atrococcus melanovirens Goux. Goux erected this genus for a few species possessing the following characters : cerarii on abdomen only, circulus absent, oral rim ducts on dorsum and usually on lateral areas of venter, presence of a group of oral collar ducts on prothorax in front of anterior spiracles, these often accompanied by a group of multilocular disc pores, body content showing a black pigment after death and especially when placed in potash. The black or blue-black body content in mealy-bugs is often a preliminary aid in identification and certainly the character has some significance in such genera as Nipaecoccus Sul9, Naiacoccus Green and Amonostherium Morrison & Morrison and others. There seem to be no special external morphological characters associated with the internal body colour. Once a specimen is mounted on the slide it is, so far, impossible to determine the original body colour. Two genera, Spilococcus Ferris and Chorizococcus McKenzie, come very close to Atrococcus. The genus Chorizococcus has 0-4 pairs of cerarii and Spilococcus has 6-17 pairs ; these are the only distinguishing characters. The number of cerarii in Atrococcus is 1-7 pairs, combining the characters of the other two genera and, indeed, Chorizococcus brevicruris McKenzie with 2 pairs of cerarii and with a noticeable lateral group of tubular ducts and multilocular disc pores on the prothorax could easily be placed in Atrococcus except for the absence of the black colour after death. For the purposes of this work the three genera are regarded as distinct but the discovery or redescription of other species in these genera may clarify the position. The following species, including one from the Channel Islands, may be separated by the key : 1 Cerarii on anal lobes only ; oral rim ducts numerous, about 20 on each tergite luffi (Newstead) Cerarii 3-7 pairs ; oral rim ducts less numerous, about 6 to each tergite ... 2 2 Cerarii 3-4 pairs ; noticeable groups of multilocular disc pores in submedian areas of dorsum ; number of multilocular disc pores on prothorax equals or exceeds that of tubular ducts .......... cracens sp. n. Cerarii 6-7 pairs ; dorsal multilocular disc pores on margins only of posterior abdominal segments ; multilocular disc pores on prothorax always less in number than tubular ducts ......... paludinus (Green) THE BRITISH PSEUDOCOCCID A E 9 Atrococcus cracens sp. n. (Text-fig, i) Pseudococcus paludinus Green, Green, 1934 : TI1 - (Misidentification.) HABIT AND DISTRIBUTION. External appearance not known although Green has recorded it as forming ovisacs in the angles of prominent leaf veins. Material has been examined from the following localities : ENGLAND. Surrey : Guildford, Centaurea nigra, 2i.vii.i922 (E. E. Green). Kent: Bearsted, Chrysanthemum leucanthemum, i6.ix.i932 (E. E. Green). Hampshire: Yateley, Crepis sp., 25. ix. 1926 (E. E. Green). Berkshire : Silwood Park, Achillea sp., 27. vi. 1949, (Holotype) Deschampsia caespitosa, 27. x. 1948, Veronica sp., 3i.viii.i948 (K. L. Boratynski). WALES. Flintshire: Prestatyn, grass, viii.i9i8, R. Newstead. RECOGNITION CHARACTERS. An ovoid-elliptical species about 2-5 mm. long. Antennae 8-segmented, 355-365 microns long. Legs well developed, slender, posterior coxae with a few translucent pores. Trochanter + femur 225-240 microns, tibia + tarsus 240-260 microns. Labium 95 microns long. Circulus absent. Ostioles present with about 8 trilocular pores and i or 2 setae on each lip. Anal ring with 6 setae in length about twice diameter of ring. Cerarii on last 3-4 segments of abdomen only ; anal lobe cerarii each with a pair of slender conical setae and a loose group of trilocular pores accompanied by 3-4 auxiliary setae and surrounded by a small area of sclerotization. Anterior cerarii similar but cerarian setae smaller and without auxiliary setae. Dorsal setae not numerous, all short and slender. Multilocular disc pores in small submarginal groups on the abdominal segments anterior to anal lobes and in noticeable submedian groups on all segments including head except segments IX + X. Tubular ducts with oral collar of two sizes, present in small numbers around the abdominal margins and associated with the submar- ginal groups of multilocular disc pores. Tubular ducts with oral rim arranged in more or less single transverse rows, a common number being about 8. Trilocular pores present. Ventral surface with a small elongate area of sclerotization on each anal lobe terminating in an apical seta longer than anal ring setae. Other ventral setae slender but longer than those on dorsum. Multilocular disc pores numerous in double or triple rows at posterior edges of segments V-VIII and at anterior edges of segments VII and VIII, numerous on segments IX + X and in a marginal group containing 15-27 pores opposite each anterior coxa ; others present between each pair of coxae. Tubular ducts with oral collar of same two sizes as on dorsum, a larger type, numerous in submarginal groups on the posterior abdominal segment, these often extending to the submedian areas ; there being also about 10-15 within each group of multilocular disc pores on prothorax. A smaller type of duct situated mainly in a transverse row on each of posterior abdominal segments. Tubular ducts with oral rim arranged in pairs around the margins of prevulvar abdominal segments and in numbers of 1-4 opposite the spiracles. Trilocular pores not numerous. NOTES. This species may be easily distinguished from others in the genus by the presence of dorsal groups of multilocular disc pores. It comes closest to A. paludinus (Green) from which it differs in possessing fewer cerarii and in the larger proportion of multilocular disc pores to tubular ducts opposite the first coxae. The accompanying illustration has been prepared from material kindly made available by Dr. K. L. Boratynski. D. J. WILLIAMS 'f't'/ - *'."'.'.'*. N - * ' r" " / i * ' i'f ' *'' I 1 %*''"' ' "" : ^\^c^ ( '-l!^ FIG. i. Atrococcus cracens sp. n. THE BRITISH PSEUDOCOCCID AE n Atrococcus luffi (Newstead) (comb, n.) (Text-fig. 2) Dactylopius luffi Newstead, 1901 : 85. Pseudococcus luffi (Newstead), Green, 1925 : 520. HABIT AND DISTRIBUTION. The ovisac is, apparently, rather closely felted, long, cylindrical, and of equal width throughout ; female remaining uncovered at the cephalic extremity. Newstead did not mention the colour but Green described it as pale flesh-colour, thinly dusted with white mealy powder. All of this material is now black and the specimens become purple-brown or black in potash. Described originally from CHANNEL ISLANDS, Guernsey, on lower stems and roots of Lepigonum rupestre, now Spergularia rupicola. Other specimens seen, all from Guernsey, are on Silene maritima, Petit Bot, Vazon Bay and on Armeria vulgaris, Houmet Benest. This is one of the species described from the Channel Islands which so far has not been collected in Britain. RECOGNITION CHARACTERS. Shape ovoid, about 2-5 mm. long, anal lobes poorly developed. Antennae 8-segmented, about 415 microns long. Labium 115-120 microns long. Legs normal, posterior coxae with a few translucent pores ; trochanter + femur 245-260 microns, tibia + tarsus 260-285 microns. Circulus absent. Ostioles well developed with inner edges of lips sclerotized and a few trilocular pores and an occasional seta on each lip. Anal ring with 6 setae twice length of ring at its greatest diameter. Cerarii represented by a single pair on anal lobes only, each with a pair of slender conical setae and about 8 trilocular pores. Dorsal setae mainly short and slender, not numerous. Oral rim ducts in more or less single transverse rows on the abdominal segments, a common number being about 20 on each segment ; on the thorax they tend to be in double transverse rows but anteriorly they become scattered. Segments III-VIII with small submarginal groups of multilocular disc pores and tubular ducts with oral collar of two sizes, a larger type usually mingled with the disc pores or just posterior to them and a smaller type just anterior to the groups. Trilocular pores evenly distributed. Simple circular pores, slightly larger than a trilocular pore, present in small numbers. Ventral surface of each anal lobe with a small area of sclerotization and an apical seta longer than anal ring setae. Ventral setae mainly longer and stouter than those on dorsum. Multi- locular disc pores rather numerous in the mid-region of the fourth and posterior segments and in submarginal groups on all abdominal segments but these becoming less numerous anteriorly ; a noticeable submarginal group of about 12 pores also present opposite each anterior coxa. Tubular ducts with oral collar of two sizes and similar to those on dorsum ; a smaller type in transverse rows in the middle of the posterior abdominal segments and a few in the submarginal areas ; a larger type present just anterior to the multilocular disc pores in the mid-region of the abdomen and mingled with the submarginal groups, there being also 3-4 associated with the submarginal groups of disc pores on the prothorax. Tubular ducts with oral rim in small numbers around the submargins of abdomen and on the pro- and mesothorax where they occupy the median areas also. Trilocular pores sparse. Simple circular pores present but not numerous. Atrococcus paludinus (Green) (Text-fig. 3) Pseudococcus paludinus Green, 1921 : 191. Atrococcus paludinus (Green), Goux, 1941 : 80. HABIT AND DISTRIBUTION. Described from Wicken Fen, Cambridgeshire, ENG- LAND, on the under surface of the foliage of Eupatorium cannabinum, Symphytum D. J. WILLIAMS FIG. 2. Atrococcus luffi (Newstead). THE BRITISH PSEUDOCOCCI D AE 13 officinale, Urtica sp., Lysimachia sp., Convolvulus sp., and Spiraea sp. This is the only correct record as other specimens collected or recorded under this name are referred to A. cracens. Green described the insect as " Adult female brownish pink, masked (on the dorsum) by a thin covering of white pulverulent secretion. Posterior extremity with a pair of short, stout, waxy tassels, with a smaller tassel on the sides of each of the two preceding segments. Younger examples are of a pale olivaceous colour." RECOGNITION CHARACTERS. An ovoid species attaining a length of 2-5 mm., anal lobes moderately developed. Antennae 8-segmented, 395-475 microns long. Legs slender, well developed, with translucent pores on hind coxae, trochanter + femur 330-370 microns, tibia + tarsus 325-380 microns. Labium 130-140 microns long. Ostioles present, each lip with a few trilocular pores and i or 2 setae. Anal ring setae about twice length of diameter of ring. Cerarii numbering 6-7 pairs on posterior abdominal segments only ; anal lobe cerarii, each with a pair of slender conical setae surrounded by a loose group of trilocular pores and a few auxiliary setae. Other cerarii similar but cerarian setae becoming more slender anteriorly and without auxiliary setae. Dorsal setae short and slender, not numerous. Tubular ducts with oral collar and multilocular disc pores in submarginal groups up to segment IV where they become less numerous ; always with a larger proportion of ducts to pores ; an occasional multilocular disc pore also present in median areas of posterior abdominal segments. Tubular ducts with oral rim on all segments except IX + X, in single transverse rows, a common number being about 6. Trilocular pores evenly distributed. Ventral surface with a small elongate area of sclerotization on each anal lobe and with a stout apical seta longer than anal ring setae. Ventral setae sparse, all slender but longer than those on dorsum. Multilocular disc pores numerous around margins of second and posterior abdominal segments and abundant in transverse rows on fifth and posterior segments ; a few also present in mid-region of some anterior segments. Another group of 2-8 always present lateral to first coxae, these accompanied by a group of 8-45 tubular ducts with oral collar similar to those on dorsum, the number of ducts although variable, always greater than number of multilocular disc pores. Other tubular ducts numerous in submarginal groups on second and posterior segments ; present also in median areas of some anterior abdominal segments. A smaller type of duct, with oral collar, sparse in median areas of posterior abdominal segments and occasionally near margins. Tubular ducts with oral rim arranged singly or in pairs around the submargins as far anterior as meta thorax and a group of 5-6 opposite each first spiracle. Trilocular pores not numerous. BALANOCOCCUS gen. n. Type of genus Riper sia scirpi Green. RECOGNITION CHARACTERS. Pseudococcidae with elongate oval body, anal lobes poorly developed. Antennae 6-segmented. Legs normal. Anterior and posterior ostioles present, poorly developed. Circuli present or absent, up to 3 small oval circuli present in one species. Anal ring with a double band of pores and 6 setae. Cerarii numbering i or 2 pairs on abdomen only. Tubular ducts with oral collar on dorsum and venter, in zone around body, these of a distinctive shape, the collar flange-shaped and occupying either half or nearly half of total length of duct. Multilocular disc pores forming zone around entire body on both dorsum and venter, and present in transverse rows on abdomen. Trilocular pores evenly distributed. NOTES. This genus comes closest to Kiritshenkella Borchsenius but differs mainly in having the trilocular pores evenly distributed over the body whereas one of the D. J. WILLIAMS . -irA. . *V -:-,<' FIG. 3. Atrococcus paludinus (Green). THE BRITISH PSEUDOCOCCI D AE 15 important characters of Kiritshenkella is the concentration of trilocular pores on the mid-line of both surfaces. Furthermore, there are in Kiritshenkella only posterior ostioles which are well developed, whereas Balanococcus possesses 2 pairs and these are poorly developed. Although the tubular ducts of both genera are similar, those of Kiritshenkella seem to be much flatter and are described as disc-like. The writer is much indebted to Professor N. S. Borchsenius for kindly examining a photograph of the accompanying illustration of B. scirpi and advising on its differences with Kiritshenkella. The two species of Balanococcus may be separated by the following key : Cerarii present on anal lobes only, circuli absent .... scirpi (Green) Cerarii present on anal lobes and segment VIII, circuli 3 in number . boratynskii sp. n Balanococcus boratynskii sp. n. (Text-fig. 4) HABIT AND DISTRIBUTION. External appearance not known. Found under the leaf sheaths of Deschampsia caespitosa, ENGLAND, Berkshire, Silwood Park, 31 . v . 1945 (K. L. Boratynski). RECOGNITION CHARACTERS. Body elongate with almost parallel sides, length about 3-5 mm., anal lobes moderately developed. Antennae 6-segmented, 260-310 microns long. Legs rather small and slender, posterior coxae with a few translucent pores ; trochanter -f femur 190-220 microns, tibia + tarsus 200-240 microns. Labium 70-75 microns long. Circuli 3 in number, small and oval, the posterior circulus much smaller than others. Ostioles poorly developed with 1-3 trilocular pores on each lip. Cerarii on anal lobes and segment VIII only, anal lobe cerarii, each with a pair of slender conical setae accompanied by 5-6 trilocular pores and a single auxiliary seta. Penultimate cerarii usually with a single conical seta and i or 2 trilocular pores. Anal ring with 2 rows of pores and 6 setae about twice length of diameter of ring. Dorsal surface with rather numerous setae, all short and slender. Trilocular pores with an even distribution. Multilocular disc pores in a marginal zone around entire body, more numerous at anterior and posterior ends ; present also in transverse rows on segments VI-VIII. Tubular ducts short with large oral collar occupying slightly less than half total length of duct. They are interspersed with the multilocular disc pores around the margins and form transverse rows on abdominal segments ; a few scattered on head. Ventral surface with each apical seta slightly shorter than anal ring setae. Ventral setae similar to those on dorsum but some on head and posterior segments tending to be longer. Trilocular pores evenly distributed. Multilocular disc pores present in a transverse row on segment V and abundant in transverse rows on posterior abdominal segments. Abundant also in a marginal zone around entire body. Tubular ducts of one size only, similar to dorsal ducts, situated in transverse rows on segment V and posterior segments. Present also in a marginal zone among the multilocular disc pores and particularly numerous in marginal groups on segment VI and posterior segments. The writer has much pleasure in naming this species after Dr. K. L. Boratynski who kindly made available material for study and who has helped in many other ways during the preparation of this work. 16 D. J. WILLIAMS o F$f?*$. ./o ' "... / /:. o/.. ' /. ' F o. . . v./ ,V- : r*, : ^v.-:\;-\ : ':'..' .. . : --; . . ; , .i ... "f ' FIG. 4. Balanococcus boratynskii sp. n. THE BRITISH PSEUDOCOCCID AE 17 Balanococcus scirpi (Green) (comb, n.) (Text-fig. 5) Ripersia scirpi Green, 1921 : 192. HABIT AND DISTRIBUTION. This species was described by Green as " Concealed at base of stems of Scirpus caespitosa [Trichophorum caespitosum], in boggy ground ; Camberley." [Surrey, ENGLAND.] The adult is apparently pink coloured and concealed beneath a coating of white mealy secretion. RECOGNITION CHARACTERS. Adult female elongate, sides subparallel, widest across fourth abdominal segment, length approximately 3-5 mm., posterior end rounded. Antennae 6-seg- mented, 150-190 microns long. Legs small and slender, posterior coxae with a few translucent pores, trochanter + femur about 130 microns, tibia -f- tarsus 105-130 microns. Labium 50-60 microns long. Anterior and posterior ostioles represented by mere slits without trilocular pores or setae on the lips. Circulus absent. Anal ring with 2 rows of pores and 6 setae about twice as long as diameter of ring. Anal lobe cerarii present only, each with a pair of conical setae set close together and surrounded by about 4 trilocular pores. Dorsal surface with small pointed setae, not numerous. Trilocular pores sparse but with an even distribution. Multilocular disc pores situated mainly in a narrow zone around the margins, the heaviest concentrations on the head and posterior abdominal segments. Others extending to median areas of segments VI and VII and occasionally in median areas of some anterior segments. Tubular ducts short, oral collar large, occupying about half total length of duct. A few present on head margins, a few on margins of fourth and posterior segments and small concentrations on segments VII-IX where they also occupy the median areas. Ventral surface with apical setae shorter than anal ring setae. Body setae small and sparse on each segment but tending to be more numerous towards margins. Trilocular pores in transverse groups in median areas. Multilocular disc pores numerous in a submarginal zone around body. They are also scattered on head and form transverse rows on segments VII-IX. Tubular ducts, similar to those on dorsum, situated around body within zone formed by multilocular disc pores. A smaller type of duct but otherwise similar in all respects, confined to median areas of segments VII, VIII and IX + X. Chnaurococcus Ferris Chnaurococcus Ferris, 1950 : 40. Type of genus Ripersia villosa Ehrhorn. This genus was erected for two rotund species each with 6-segmented antennae and with a single pair of cerarii on anal lobes only. The following species seems to belong to this genus although like C. trifolii (Forbes), it lacks the dorsal tubular ducts of the type species. Chnaurococcus subterraneus (Newstead) (comb, n.) (Text-fig. 6) Ripersia subterranea Newstead, 1893 : 79. Ripersia tomlinii Newstead, Newstead, 1903 : 187 (in part). Ripersia subterranea Newstead, Newstead, 1903 : 189. Ripersia formicarii Newstead, In Donisthorpe, 1907 : 5 (syn. n.). Ripersia europaea Newstead, Green, 1921 : 191. (Misidentification.) Ripersia europaea Newstead, var., Green, 1926 : 183. ENTOM. 12, I. 2 i8 D. J. WILLIAMS /a^ ^i ;>CQ D ft d FIG. 5. Balanococcus scirpi (Green). THE BRITISH PSEUDOCOCCID AE 19 HABIT AND DISTRIBUTION. Newstead described the insect originally as " female adult ; dark red-brown, turns dark purple in caustic potash ". Specimens have been examined from the following localities : ENGLAND. Norfolk : Ingoldisthorpe, King's Lynn, on roots of Nardus stricta in nests of Formica flava (types). Dorsetshire : Portland, nest of Lasius niger. Cornwall : Pudstone, nests of Lasius niger, 8 . vii . 1920 (H. Donisthorpe) ; Stepper Point, vii. 1920. Somersetshire: Porlock, nests of Lasius niger, v. 1915 (W. C. Crawley) ; Minehead, nest of Lasius niger, ix. 1920 (E. E. Green). Devonshire: Dartmouth, nest of Lasius niger (H. Donisthorpe). Gloucester- shire: Bristol, in ant's nest, vii. 1924 (H. Donisthorpe). Sussex: Eastbourne, nests of Lasius niger, 6.xi.i924 (H. Donisthorpe). Kent : Charing, with Lasius niger (type of R. formicarii). SCOTLAND. East Lothian, North Berwick Law (E. E. Green). RECOGNITION CHARACTERS. A broadly oval species measuring approximately 2 mm. long ; anal lobes moderately developed. Antennae 6-segmented, 235-260 microns long. Legs small and stout, normal, trochanter + femur 180-190 microns, tibia + tarsus 190-200 microns. Labium 105-115 microns long. Circulus absent. Ostioles well developed, with inner edges of lips sclero- tized and each lip with 4-5 trilocular pores and an occasional seta. Anal ring with a double band of pores and 6 setae only slightly longer than diameter of ring. Cerarii represented by a pair on anal lobes only, each with a pair of short conical setae, these usually straight but sometimes curved and surrounded by a loose group of 6-7 trilocular pores. Dorsal and ventral setae short and mainly rather stout. Apical setae longer than anal ring setae. Trilocular pores somewhat numerous and evenly distributed on both surfaces. Ventral surface with multilocular disc pores on fifth and posterior segments only, in single or slightly irregular transverse rows at posterior edges of segments. Tubular ducts of one size, on venter only, situated in single transverse rows at middle of most abdominal segments and in small submarginal groups. NOTES. This species comes closest to C. trifolii (Forbes), another species found in ants' nests and known from U.S.A., but differs in possessing only 6-7 trilocular pores with each cerarius whereas in C. trifolii the numbers of trilocular pores are much more numerous. CHORIZOCOCCUS McKenzie Chorizococcus McKenzie, 1960 : 692. Type of genus Chorizococcus wilkeyi McKenzie. This genus was erected for species with oral rim ducts, the cerarii numbering from 0-4 pairs without auxiliary setae except those on anal lobes. It differs from Spilococcus mainly in possessing fewer cerarii but is almost identical with Atrococcus discussed earlier. So far as is known, all species of Spilococcus are yellow or pinkish but species of Atrococcus are black, especially after death, and turn a distinct black or blue-black in potash. For the purposes of this work the genera are regarded as distinct. Chorizococcus lounsburyi (Brain) Pseudococcus lounsburyi Brain, 1912 : 179. Pseudococcus (Trionymus) peregrinus Green, 1925^ : 40, 41 (syn. n.). Trionymus lounsburyi (Brain), Ferris, In Zimmerman, 1948 : 260, 261. D. J. WILLIAMS O FIG. 6. Chnaurococcus subterraneus (Newstead). THE BRITISH PSEUDOCOCCI D AE 21 Trionymus lounsburyi (Brain), Ferris, 1950 : 271. Pseudococcus lounsburyi Brain, De Lotto, 1958 : 96, 97. Chorizococcus peregrinus (Green), McKenzie, 1960 : 701. This is a difficult species to identify satisfactorily. It has never been figured ade- quately from the original type material from South Africa and the only illustration available is that prepared by Ferris from material collected in Hawaii. McKenzie has considered, on information received from Dr. H. Morrison, that this material is the same as that described by Green as Pseudococcus (Trionymus) peregrinus and differs from C. lounsburyi. This distinction is based mainly on the differences in colour and habit of the adult female. The writer has examined many specimens from South Africa, Egypt, Hawaii, Holland and England and, although there is variation in the numbers of multilocular disc pores and oral rim ducts, there is little evidence that the material represents different species. On a request from the author, Dr. H. Morrison has kindly re-examined material at Washington and has come to similar conclusions, although he has stated that the results must be regarded as tentative until more material is studied. As C. peregrinus comes within the known range of variation, the name is sunk as a synonym of C. lounsburyi. The variation has also been discussed by De Lotto who has examined many specimens from Africa. For the time being the illustration given by Ferris is accepted although the numbers of multilocular disc pores and oral rim ducts tend to be rather high. As pointed out by De Lotto there are often multilocular disc pores on the posterior dorsal abdominal segments. Although there are exceptions, most of the records are from the plant families Amaryllidaceae and Liliaceae. Material is at hand from ENGLAND, all under glass, from Hampshire, Exbury, Nerine roots (peregrinus type) and Surrey, Abinger Hammer, on bulbs of Crinum sp., Sprekelia sp. and Hippeastrum sp. Other material has also been examined from England, without locality, from the bulbs of Amaryllis sp. DYSMICOCCUS Ferris Dysmicoccus Ferris, 1950 : 53. Type of genus Dactylopius brevipes Cockerell. The writer has accepted the interpretation of this genus given by McKenzie (1960) and a further discussion is given under Trionymus. Only two species recorded from Britain belong to the genus and these may be separated as follows : Body elongate, multilocular disc pores numerous in transverse rows on posterior abdominal segments of venter ...... walkeri (Newstead) Body rotund, multilocular disc pores few, situated around vulva only wistariae (Green) Dysmicoccus walkeri (Newstead) (comb, n.) (Text- fig. 7) Dactylopius walkeri Newstead, 1891 : 164. Dactylopius walkeri Newstead, Newstead, 1903 : 169. Pseudococcus walkeri (Newstead), Fernald, 1903 : 112. Pseudococcus walkeri (Newstead), Green, 1916 : 31. Pseudococcus walkeri (Newstead), Green, 1925 : 517. D. J. WILLIAMS D O o FIG. 7. Dysmicoccus walkeri (Newstead). THE BRITISH PSEUDOCOCCID AE 23 Pseudococcus walkeri (Newstead), Green, 1926 : 182, 183. Pseudococcus walkeri (Newstead), Green, 1928 : 30. HABIT AND DISTRIBUTION. Described as " Elongate brown. Antennae and legs pale yellow-brown, covered with a dense white powder ; the cottony appendages of the margin stout, six of these at the abdominal extremity longer and stouter than the others, the second pair longest and very stout, in length equal to width of body. . . . ". This is normally a grass-infesting species and specimens have been examined from the following localities : ENGLAND. Cheshire : Manley, near base of Agrostis tenuis, ix.iSgo (R. Newstead). Surrey: Camberley, vii.igis, 13. ix. 1920, viii.1922, 5.ix.i922, viii.1926 (Calluna sp. stems), 22.viii.i939 (E. E. Green) ; Ashtead, 22.viii.i939. Kent: Bearsted, 14. ix. 1926 (E. E. Green). Somersetshire: Cheddar, viii.1926 (E. E. Green). WALES. Brecknockshire : Llangammarch, ix.i925 (E. E. Green). Montgomeryshire: Nant Cwmdu Aberhosan, 2o.vii.i9i9 (R. Newstead). SCOTLAND. East Lothian : Aberlady, viii-1925 (E. E. Green). Aberdeenshire : Monymusk, viii.1920 (F. Laing). CHANNEL ISLANDS. Herm : Petit Bot. RECOGNITION CHARACTERS. An elongate-oval species measuring up to 4-5 mm. long, anal lobes poorly developed. Antennae 8-segmented, 410-515 microns long. Legs normal, trochanter + femur 370-395 microns, tibia -f- tarsus 375-440 microns. Labium 125-130 microns long. Circulus not large, rounded. Ostioles with 3-4 trilocular pores and 2-3 setae on each lip. Anal ring with 6 setae twice as long as its diameter. Cerarii numbering 15-17 pairs, usually 15 pairs, those lacking being on the head ; anal lobe cerarii each with a pair of conical setae and numerous trilocular pores accompanied by about 10 auxiliary setae and all borne on a distinct area of sclerotization, larger in area than anal ring. Anterior cerarii each with smaller cerarian setae, a few trilocular pores and one or two auxiliary setae. Dorsal setae of various sizes but mainly short and slender. One or two multilocular disc pores usually present on penultimate segment. Tubular ducts with oral collar of 2 sizes, a larger type numerous on all segments and a smaller type sparse on some of the posterior abdominal segments. Trilocular pores evenly distributed. Ventral surface with a small area of sclerotization on each anal lobe terminating at a stout apical seta longer than anal ring setae. Ventral setae rather numerous, all slender but mainly longer than those on dorsum. Multilocular disc pores numerous on posterior abdominal segments, there being double or triple rows on the posterior edges of segments VI-VIII and on the anterior edges of segments VII and VIII ; numerous also on segments IX + X, a few also present behind first coxae, occasionally at random on thorax. Tubular ducts of same sizes as on dorsum, a larger type on fourth and posterior segments and numerous on margins of posterior abdominal segments ; smaller marginal groups present on thorax and head. A smaller type of duct in median areas of fourth and posterior segments only, sparse. Trilocular pores present. NOTES. This species comes close to D. timberlakei (Cockerel!) , another elongate species on grasses described from U.S.A. and with 17 pairs of cerarii but in this case the circulus is moderately large and divided by a distinct intersegmental furrow. In D. walkeri the circulus is oval and not divided. Dysmicoccus wistariae (Green) (comb, n.) Pseudococcus wistariae Green, 1923 : 218. Pseudococcus piricola Siraiwa, 1935 : 69 (syn. n.). Pseudococcus cuspidatae Rau, 1937 : *95 ( svn - n -)- Dysmicoccus cuspidatae (Rau), Ferris, 1950 : 61. Dysmicoccus piricola (Siraiwa), Takahashi, 1957 : 3- 24 D. J. WILLIAMS This species was described from material collected on Wistaria sp. at a Japanese nursery garden, presumably under glass, at St. Albans, Hertfordshire, ENGLAND. Dr. Harold Morrison has kindly examined a specimen and he agrees that it is identical with D. cuspidatae described from U.S.A. The latter name has already been synony- mized by Takahashi with D. piricola described from Japan. Ferris has redescribed and illustrated this species under D. cuspidatae. EURIPERSIA Borchsenius Euripersia Borchsenius, 1948 : 955. Type of genus Euripersia amnicola Borchsenius. Two British species are included in this genus on the basis of the descriptions of E. amnicola Borchs. and E. brevispina recently described by Borchsenius & Ter- Gregorian (1956). The essential features of the genus are the oval body ; antennae 6-7-segmented ; claw with a denticle although at times absent ; quinquelocular disc pores usually present on venter although in the type species they are present only in the first stage larva ; cerarii numbering at most 3 pairs, 2 of which confined to segments VIII and IX ; circuli numbering from 1-3 or absent entirely ; multi- locular disc pores confined to ventral abdominal segments. Although the two following species were described originally in the genus Ripersia, they are excluded from this genus despite certain similarities to Ripersia corynephori Signoret, the type species, redescribed by Reyne (1951). This species has 8-segmented antennae, 2 pairs of cerarii, multilocular disc pores on both dorsum and venter, quinquelocular disc pores absent although present in the first stage larva. As very little else is known about this species and as the following species have no multilocular disc pores on the dorsum, the genus Ripersia is disregarded from the present study. The two British species have been mentioned in the literature under a variety of names and consequently only the original references can be trusted. Euripersia europaea (Newstead) (comb, n.) (Text-fig. 8) Ripersia europaea Newstead, 1897 : 167. Ripersia tomlinii Newstead, Donisthorpe, 1907 : 5. (Misidentification.) Ripersia tomlinii Newstead, Green, 1920 : 122. (Misidentification.) Ripersia tomlinii Newstead, Green, 1925 : 518 (in part). Ripersia wunni Reyne, 1953 : 235-239 (syn. n.). HABIT AND DISTRIBUTION. Newstead described this species as " densely clothed with white mealy wax ; segmentation more or less distinct ". Its most favoured positions are apparently under stones in ants' nests and they presumably feed on the fine rootlets. Specimens are known from Britain as follows : CHANNEL ISLANDS. Guernsey : Watville, ants' nests (B. Tomlin), (europaea types) ; Fort Doyle, under stones with ants, 9 . ix . 1924 (E. E. Green) ; 29 . xii . 1926, 8 . vi . 1947 (R. H. Le Pelley) ; also material without data from other localities in nests of Lasius niger. ENGLAND. Isle of Wight : Blackgang, with Lasius flavus and L. niger (H. Donisthorpe) ; San- down, nest of Lasius niger, 4^.1910 (H. Donisthorpe) ; Ventnor, 26. ix. 1922 (H. THE BRITIH PSEUDOCOCCID AE FIG, 8. Euripersia europaea (Newstead). 26 D. J. WILLIAMS Donisthorpe). Kent : Dover, nest of Lasius niger (H. Donisthorpe). Sussex : Eastbourne, with Lasius niger, 6.ix.i924 (H. Donisthorpe). Dorsetshire : Swanage, 14. ix. 1904 (B. Tomlin). Cornwall : Whitsand Bay, with Lasius niger (H. Donis- thorpe). RECOGNITION CHARACTERS. A small broadly oval species approximately 2-5 mm. long, anal lobes poorly developed. Antennae 6-segmented, 225-260 microns long. Legs small, claw with or without a denticle, in some cases only the faintest sign of a denticle or may be present or absent on different claws of same specimen. Trochanter + femur 155-165 microns, tibia + tarsus 170-205 microns. Labium 90-95 microns long. Circulus absent. Ostioles present, each lip with about 4 trilocular pores but apparently without setae. Anal ring with a double band of pores and 6 setae about same length as ring at its greatest diameter. Cerarii numbering 2-4 pairs ; anal lobe cerarii each with 2 slender conical setae and about 5 trilocular pores, the space between the setae lightly sclerotized ; penultimate cerarii similar but cerarian setae slightly smaller. The preocular cerarii often present, although difficult to see. Their presence can be detected by the paired setae and the small concentration of trilocular pores. Another pair of cerarii sometimes present on thorax. Dorsal setae sparse, all small and slender. The only pores present on the dorsum are trilocular, rather numerous with an even distribution. Ventral surface with a stout pair of apical setae longer than anal ring setae. Ventral setae not numerous, all slender and short but tending to be longer than dorsal setae especially on posterior segments. Multilocular disc pores at anterior and posterior edges of segments VII and VIII and present on segments IX + X, there being scarcely more than 50 altogether. Quinquelocular disc pores present in groups around the basal antennal segments and each coxa. Tubular ducts sparse, of one size only, confined to metathorax and abdomen, forming transverse rows. Trilocular pores of similar distribution to those on dorsum. NOTES. Specimens examined of Ripersia wunni Reyne are identical with E. euro- paea. As pointed out by Reyne, the denticle on the claw is, at times, hardly percepti- ble and in some specimens it is absent entirely. Euripersia tomlinii (Newstead) (comb, n.) (Text-fig. 9) Ripersia tomlinii Newstead, 1892 : 146, 147. Ripersia tomlinii Newstead, Newstead, 1903 : 186 (in part). Ripersia exul Green, 1924 : 46, 47 (syn. n.). Ripersia mesnili Balachowsky, 1934 : 67-70 (syn. n.). Ripersia exul Green, Green, 1934 : 1IJ - HABIT AND DISTRIBUTION. Described by Newstead as " Dull orange-yellow, . . . Sac of the female globose or ovate, composed of close, white waxy material, very compact on the inside ;" Green described the ovisac as measuring 5 mm. in diameter. The insect lives on grass roots in association with ants' nests. Material has been examined from the following localities : CHANNEL ISLANDS. Guernsey : Moulin Huet, ix.iSgi (Miss Tomlin) (Type) ; Chappelle dom Hue, 24.vii.i923 (J. R. le B. Tomlin (exul Type) ; viii . 1958 (R. H. Le Pelley) ; Vazon Bay, ix . 1924 (E. E. Green) ; Belle Elizabeth; Lihou, ix.1925 (E. E. Green). Herm : ix.i924 (E. E. Green) ; Rat Is., viii. 1923 (J. R. le B. Tomlin). Alderney : viii. 1892 (W. A. Luff). Sark : (W. A. Luff). ENGLAND. Suffolk: ix, 1932 (A. S. Watt). THE BRITISH PSEUDOCOCCID AE 27 j v.v^*.; / . -\ /V\\'v N V Vta:. ^ > ' o FIG. 9. Euripersia tomlinii (Nevvstead). 28 D. J. WILLIAMS RECOGNITION CHARACTERS. Adult female broadly oval about 3-5 mm. long, anal lobes poorly developed. Antennae 6-7-segmented, 230-260 microns long, the third segment often divided into two of equal length and the terminal segment often showing signs of division. Legs small and slender, claw with a distinct denticle ; trochanter + femur 145-175 microns, tibia + tarsus 170-205 microns. Labium 70-80 microns long. Circuli 2 or 3 in number, on the second, third and fourth segments, all transversely elliptical and with a flat protuberance ; the circulus on the fourth segment much smaller than the others and sometimes absent. Ostioles with inner edges of lips sclerotized and with about 3 trilocular pores and an occasional seta on each lip. Anal ring with 3 rows of pores and 6 setae over twice length of diameter of ring. Cerarii numbering 2 pairs only ; anal lobe cerarii each with a pair of small conical setae and about 5 trilocular pores, the space between the setae sclerotized ; a single auxiliary seta present anterior to the cerarius. Penultimate cerarii similar but cerarian setae smaller. Dorsal setae not numerous, a short slender type interspersed with a minute lanceolate type. Tubular ducts present each without noticeable collar, situated more or less in single rows at anterior and posterior edges of abdominal segments but scattered on thorax and head ; sparse. Trilocular pores not numerous, evenly distributed. Ventral surface with apical setae longer than anal ring setae. Ventral setae few, all slender but longer than those on dorsum. Multilocular disc pores arranged in single rows at anterior and posterior edges of abdominal segments, mainly in median areas ; a few also present on thorax. Quinquelocular disc pores present between first coxae and clypeus and labium, usually very few, in which case they may number about 6 but sometimes they are more numerous and may be present on the mesothorax. Tubular ducts similar to those on dorsum, situated between the multilocular disc pores on each of abdominal segments and on the lateral areas ; on the thorax and head they become scattered. Trilocular pores sparse. NOTES. Some confusion seems to have arisen in identifying this species. The third antennal segment is often divided into two segments of equal length and the terminal segment often shows signs of division. When Green described R. exul he stated that it differed from R. tomlinii in having more robust antennae and a broader and shorter labium. It now seems evident that Green based this distinction on misidenti- fied specimens of Euripersia europaea. The type of R. exul is identical with E. tomlinii. Specimens of Ripersia mesnili Balachowsky, described from Corsica, also seem to be identical with E. tomlinii. Balachowsky described the tubular ducts as being on the venter only but they are present on both surfaces on specimens examined from Lac de Nino and Bergeries de Paratella mentioned in his original description. The name R. mesnili is, therefore, sunk as a synonym of E. tomlinii. HELIOCOCCUS Sul? Heliococcus Sul9, 1912 : 39-48. Type of genus Heliococcus bohemicus Sulc. Since Sulg erected this genus, a few more species were added to it by Goux (1934) and a number of new species have been described by Borchsenius (1949). By far the greatest number occurs in the Palaearctic Region but four are known from North America and one from the Ethiopian Region. Belonging to the Phenacoccus group with a denticle on the claw and with quinque- locular pores, the genus is easily recognized by the peculiar crateriform ducts, the larger ducts often with 1-4 minute setae attached to the base of the duct prominence. The following species seems definitely to belong to this genus. THE BRITISH PSEUDOCOCCID AE 29 Heliococcus minutus (Green) (comb, n.) (Text-fig. 10) Phenacoccus minutus Green, 1925 t 519. HABIT AND DISTRIBUTION. Described as clustered on the underground stems of Erica cinerea, CHANNEL ISLANDS, Guernsey, L'Ancresse, September. The adult female is described as dull purplish. Body rather closely dusted with coarse mealy secretion. No marginal tassels but with a pair of divaricating liguliform processes projecting from the anal area. This insect has so far not been found in Britain. RECOGNITION CHARACTERS. A small oval species measuring approximately 1-5 mm. long, anal lobes well developed, with a dorsal area of weak sclerotization either same size or larger in area than ring. Antennae g-segmented, 310-370 microns long. Legs normal, claw with a distinct denticle, trochanter + femur 215-220 microns, tibia + tarsus 225-260 microns. Labium 95-105 microns long. Circulus absent. Ostioles present, each with 4-5 trilocular pores, setae often absent, especially on the posterior pair, but usually 2-3 present on each lip of anterior pair. Anal ring with 6 setae about twice length of diameter of ring. Cerarii numbering 18 pairs, each with 2 lanceolate setae ; anal lobe cerarii with a small concentration of about 6-8 trilocular pores ; anterior cerarii with cerarian setae much smaller and accompanied by 3 or 4 trilocular pores. Dorsal surface with minute lanceolate setae. Trilocular pores not numerous but evenly distributed. Crateriform ducts present, of 3 sizes. The largest type each with 3 minute setae attached to the base of the duct prominence, situated mainly on the mid-line and around the submargins but their positions not constant. An intermediate type, usually with 2 setae attached to the base of the duct prominence, situated mainly in the submedian areas. Both types often occupying similar positions in different specimens. A small type of duct usually present on the margins and occasionally in the submedian areas, these very sparse, without setae attached to the base of the duct prominence but often a single seta in close association with it. Ventral surface with a pair of stout apical setae longer than anal ring setae. Anal lobes each with a small elongate strip of sclerotization, not attached to the apical seta. Ventral setae slender and sparse but a few lanceolate setae, similar to those on dorsum, occupying the lateral areas. Multilocular disc pores confined to fifth and posterior segments, very few and present in the median areas at posterior edges of segments. Quinquelocular disc pores in median and submedian areas, scattered on head and thorax, but lying in transverse rows on abdominal segments mainly at anterior edges. Trilocular pores sparse. Tubular ducts with oral collar on abdomen and occasionally on metathorax, situated in single transverse rows but absent in submarginal areas, there being scarcely more than 20 altogether. A few crateriform ducts of the same size as the smallest type on dorsum, present around margins of metathorax and some of abdominal segments. HETEROCOCCUS Ferris Heterococcus Ferris, 1918 : 65. Heterococcus Ferris, Morrison, 1945 : 45. Type of genus Heterococcus arenae Ferris. The important characters of this genus are the S-g-segmented antennae, claw usually with a denticle, and the presence of quinquelocular disc pores on the dorsum and venter which replace the normal trilocular pores. All the species are found at the bases of grass stems and only one species is known from Britain. D. J. WILLIAMS O FIG. 10. Heliococcus minutus (Green). THE BRITISH PSEUDOCOCCI D AE 31 Heterococcus pulverarius (Newstead) Ripersia pulveraria Newstead, 1892 : 145. Phenacoccus nudus Green, 1926 : 172. Heterococcus nudus (Green), Green, 1928 : 21. Heterococcus pulverarius (Newstead), Williams, 1961 : 673. The name has been given in error to a few species here discussed under Trionymus. A redescription and illustration has been given recently by Williams. ENGLAND. Cheshire : Sandiway, Agrostis tenuis, viii.iSgi (R. Newstead). Surrey : Camberley, vi.ig25 (E. E. Green). Berkshire : Silwood Park, Holcus mollis, Festuca sp. 8.viii.i949 (K. L. Boratynski). NIPAECOCCUS Sulg Nipaecoccus Suk;, 1945 : 1-48. Nipaecoccus Suk;, Ferris, 1950 : 103. Type of genus Dactylopius nipae Maskell. The members of this genus are characterized by a peculiar blue-green or brown body content which shows up particularly during the preparation in caustic potash. There are always some dorsal setae of the same size or near the same size as cerarian setae and the antennae are usually y-segmented. Nipaecoccus nipae (Maskell) Dactylopius nipae Maskell, 1893 : 230. Pseudococcus nipae (Maskell), Fernald, 1903 : 107. Pseudococcus nipae (Maskell), Green, 1917 : 262, 263. Pseudococcus nipae (Maskell), Green, 1930 : 10. Nipaecoccus nipae (Maskell), Suk;, 1945 : 148. Nipaecoccus nipae (Maskell), Ferris, 1950 : 109. A species recorded from palms in a few greenhouses in Britain. For a description and illustration see the work by Ferris. ENGLAND. Surrey : Kew, Royal Botanic Gardens, Cocos, Kentiopsis, Sabal, xii.i9i6. London: Palm (J. C. F. Fryer). SCOTLAND. Midlothian: Edinburgh, Royal Botanic Gardens, Calyptrogyne sp. ix.iQ25 (E. E. Green). PELIOCOCCUS Borchsenius Peliococcus Borchsenius, 1948 : 954. Type of genus Phenacoccus chersonensis Kiritchenko. This genus is probably of world wide distribution although the bulk of the known species is from the Palaearctic Region. The distinguishing features of the genus are clusters of multilocular disc pores, each cluster with one or more slender tubular ducts near the centre ; claw with a denticle ; often with quinquelocular disc pores on the venter. 32 D. J. WILLIAMS Peliococcus balteatus (Green) (Text-fig, n) Phenacoccus balteatus Green, 1928 : 21. Peliococcus balteatus (Green), Borchsenius, 1949 : 244. HABIT. Described by Green as" Colour of living examples pale yellow with a fringe of very short tassels, with a pair of slightly longer tassels at the posterior extremity." From the under surface of the foliage of various grasses, more particularly on Arrhena- therum elatius, Cheddar Gorge, Somerset, ENGLAND, viii.1926. This is the only record for Britain. RECOGNITION CHARACTERS. Adult female elongate oval attaining a length of 3-5 mm. in the available specimens ; anal lobes moderately developed. Antennae g-segmented, 450-490 microns long. Legs normal, rather large, claw with a denticle, trochanter -j- femur 315-350 microns, tibia + tarsus 380-425 microns. Labium about no microns long. Circulus present, oval. Anterior and posterior ostioles with 2-4 setae and a few trilocular pores on each lip. Anal ring with 6 setae about twice length of its diameter. Cerarii numbering 1 8 pairs. Anal lobe cerarius usually with a group of 6 lanceolate setae and a few trilocular pores, the middle setae of the group surrounding a small sclerotized area. Anterior cerarii each with 2 smaller cerarian setae except those on head where there are up to 4 setae present ; each cerarius accompanied by a few trilocular pores. The cerarii often elevated slightly from the surrounding derm, especially those at the anterior and posterior ends of the body. Dorsal surface of body with minute setae, sparse, some often with one or two trilocular pores near the base. Trilocular pores very few. On all segments except IX + X, there are pore clusters of 3-6 multilocular disc pores, the commonest number being 4. A single minute tubular duct present in the centre of each cluster. Clusters arranged in transverse rows at posterior edges of segments except on head where they become scattered. Ventral surface of each anal lobe with a small area of sclerotization and an apical seta longer than anal ring setae. Ventral body setae around the margins, small and similar to those on dorsum ; in the median areas they are slender and much longer. Pore clusters arranged mainly on head, in transverse rows on segments III-V and around submargins of third and all posterior segments except IX + X. Multilocular disc pores, smaller than those in clusters, abundant at posterior edges of sixth and posterior segments. Quinquelocular disc pores few, present in median areas only between coxae and at anterior edges of segments II-VII. Tubular ducts with oral collar of one size, in transverse rows just anterior to the multilocular disc pores on segments VII and VIII and occasionally on margins of these segments. Trilocular pores sparse. NOTES. This species seems to come close to P. venustus (Green) from Iceland and P. samtogensis (Rau) from U.S.A. These two species have clusters of multilocular disc pores consisting mainly of 3 pores, whereas in P. balteatus the clusters consist mainly of 4 pores. Furthermore P. venustus has 8-segmented antennae and those of the other two species are 9-segmented. Both P. balteatus and P. saratogensis have a similar distribution of multilocular disc pores in transverse rows on segments VI-VIII but P. venustus has an extra row on segment V. PHENACOCCUS Cockerell Phenacoccus Cockerell, 1893 : 318. Phenacoccus Cockerell, Ferris, 1950 : 120. Type of genus Pseudococcus aceris Signoret. Some of the important characters of this genus are the S-g-segmented antennae, a denticle on the claw, cerarii numbering from 9-18 pairs. Although not always THE BRITISH PSEU DOCOCCID AE FIG. ii. Peliococcus baltcatus (Green). ENTOM. 12, I. 34 D. J. WILLIAMS present, there are often quinquelocular disc pores on the venter and the dorsal setae are often minute and lanceolate. Borchsenius (1949) has resurrected the genus Paroudablis Cockerell because the type species Boisduvalia piceae Loew has larger tubular ducts on the dorsum than on the venter. No such distinction is made here although two British species possess these larger ducts. Only three species are known from Britain and these may be separated by the following key : 1 With 9-14 pairs of cerarii .......... 2 - With 1 8 pairs of cerarii .-- . . . . . . . . aceris (Signoret) 2 Cerarii numbering 9 pairs, circuli absent ..... interruptus Green Cerarii numbering 14 pairs, circuli numbering 2-3, small and with rounded projections sphagni (Green) Phenacoccus aceris (Signoret) Pseudococcus aceris Signoret, 1875 : 329. Pseudococcus ulicis Douglas, 1888 : 88. Pseudococcus ulmi Douglas, i888a : 124. Pseudococcus aceris Signoret, Douglas, 1890 : 153. Pseudococcus quercus Douglas, 1890 : 154. Pseudococcus socius Newstead, 1892 : 144. Phenacoccus aceris (Signoret), Fernald, 1903 : 90. Phenacoccus aceris (Signoret), Green, 1915 : 180. Phenacoccus aceris (Signoret), Green, 1921 : 151. Phenacoccus aceris (Signoret), Green, 1923 : 215. Phenacoccus aceris (Signoret), Green, 1926 : 182. Phenacoccus aceris (Signoret), Green, 1928 : 30. Phenacoccus aceris (Signoret), Ferris, 1950 : 126. This is one of the most widely spread mealy-bugs in Britain. It is found on a variety of trees and is, apparently, very common on gorse. Ferris has given an excellent illustration and in his description he stated that there are 2 circuli present. This condition is probably the more common, but specimens at hand collected at Adel, Yorkshire, on gorse have only a single circulus. In other respects they are similar to the specimens with 2 circuli. Borchsenius (1949) has accepted the name Phenacoccus quercus (Douglas) for specimens collected in Armenia on oak, stating that the species differs from P. aceris in possessing only a single circulus. Two specimens of Douglas' original material have been prepared and, although they are in poor condition, there is sufficient evidence of the presence of 2 circuli. It seems possible that the Armenian material represents a different species. The specimens actually seen by the writer are listed below but there are many other records in the literature. ENGLAND. Berkshire : Windsor, Quercus sp., 1930 (H. Donisthorpe) ; Silwood Park, Quercus sp., 26. v. 1948, Carpinus betulus, 26.^.1949, Fagus sp., 3. v. 1955 (K. L. Boratynski). Buckinghamshire : Latimer, Ulmus sp., 29^.1929 (F. Laing). Cheshire : Chester, Sorbus aucuparia, Laburnum sp., Quercus sp. (R. Newstead). Dorsetshire : Lyme Regis, Ulex europaeus, iv.i92O. Essex : Epping Forest, Quercus sp., 25. v. 1923 (C. L. Wittycombe) . Hampshire: Bournemouth, Ulex europaeus, i6.iv.i9O2; Beaulieu, Myrica gale, vi.igig. Kent: Bearsted, Ulex europaeus, THE BRITISH PSEU DOCOCCID AE 35 London: Lewisham (ulmi Type). Norfolk: Ingoldisthorpe, Ulex euro- paeus, viii.iSgi (R. Newstead). Northumberland : Riding Mill, Sycamore, vii.igso (D. J. Williams). Surrey : Camberley, Ulex minor, 3 . xi . 1929 (E. E. Green) ; Oxshott, Castanea sativa, Fagus sylvatioa, 22. iv. 1921 (K. G. Blair) ; Kew, Apple, 3. .1955 (K. L. Boratynski) ; Peach Hill, Ulex europaeus, I2.vii.i956 (K. L. Boratynski). Warwickshire: Farnborough, Buxus sempervirens, 25.vii.i922 (R. Newstead). Wiltshire: Wootton Bassett, peach, 21. iv. 1938. Yorkshire: Wakefield, currant (R. Newstead) (socius Type) ; Adel, Ulex europaeus, 24. vi. 1956 (D. J. Williams). SCOTLAND. Kincardineshire : Strachan, Ulex europaeus, 30. iv. 1927 (G. D. Morison). Phenacoccus interruptus Green (Text-fig. 12) Phenacoccus interruptus Green, 1923 : 215. Phenacoccus interruptus Green, Green, 19250 : 43. Phenacoccus interruptus Green, Green, 1928 : 30. HABIT AND DISTRIBUTION. Described originally as " Colour pale purplish, masked by a rather close covering of white powdery secretion." Found on grasses from the following localities in ENGLAND. Surrey : Camberley, 28.viii.i922 (Type), I5.viii. 1923, 3.ix.i934 (E. E. Green). Somersetshire: Cheddar (E. E. Green). RECOGNITION CHARACTERS. Body elongate elliptical, sides subparallel, length about 3-5 mm. anal lobes well developed. Antennae g-segmented, 380-405 microns long. Legs well developed, normal ; claw with a distinct denticle, trochanter + femur 240-275 microns, tibia + tarsus 320-340 microns. Labium 90-120 microns long. Circulus absent. Ostioles present ; posterior pair with about 6 trilocular pores on each lip and apparently without setae ; anterior pair with about 6 trilocular pores and 4 setae on each lip. Anal ring with 2 rows of pores and 6 setae over twice length of diameter of ring. Cerarii confined to anterior and posterior ends of body only, there being 9 definite pairs present. Anal lobe cerarii, each with a pair of well-developed lanceolate setae and a loose group of trilocular pores accompanied by about 2 minute auxiliary setae and all borne on a sclerotized plate slightly less in area than anal ring. Cerarii on segments VIII and VII on smaller sclerotized plates, each cerarius with a pair of short lanceolate setae and about 4 trilocular pores. On segments VI and V, cerarii each with a pair of setae and 3-4 trilocular pores but not on sclerotized plates. First 3 cerarii on head each with about 3 setae and fourth with 2 setae, all on sclerotized plates which become progressively smaller posteriorly. Sometimes single setae, a little stouter than dorsal body setae, present in positions of some of thoracic cerarii. Dorsal surface with numerous minute lanceolate setae. Trilocular pores evenly distributed. Tubular ducts present of one size only, these rather large and without an oral collar, scattered on head and thorax but forming transverse rows on abdominal segments. Ventral surface with a small elongate area of sclerotization on each anal lobe and an apical seta longer than anal ring setae. Ventral setae mainly slender and much longer than those on dorsum but small lanceolate setae present around margins. Multilocular disc pores on fifth and posterior segments only. Segment V with about 4 pores only, VI with 24-34, VII with 53-62, VIII with 66-84, IX -}- X with 36-48. Quinquelocular disc pores in median areas only. Trilocular pores on abdominal segments and around margins of thorax and head. Tubular ducts narrower than dorsal ducts, without an oral collar, present in transverse rows on all abdominal segments and a few in median and marginal areas of thorax. NOTES. In his original description, Green described this insect as possessing " A single rather obscure, circular medio- ventral osteole." Furthermore he shows this D. J. WILLIAMS o FIG. 12. Phenacoccus interruptus Green. THE BRITISH PSEUDOCOCCI D AE 37 in a figure. The holotype specimen shows a round hole in the position of the circulus but it is evident that it is merely damage, probably caused by a needle as there are similar holes near it. Other specimens examined show no sign of a circulus and the species must be considered as not possessing one. Borchsenius (1949) has recorded this species from Russia as Paroudablis interruptus and possessing a large circulus but this is probably a different species. A single distorted specimen is at hand from Dorsetshire collected on sedge which shows a rather large circulus and this is possibly the same as the Russian species. It has not been possible to describe this species and the matter is left in abeyance until more satisfactory material is collected. Phenacoccus sphagni (Green) (Text-fig. 13) Pseudococcus sphagni Green, 1915 : 178, 179. Pseudococcus sphagni Green, Green, 1920 : 119, 120. Phenacoccus sphagni (Green), Reyne, 1958 : 20. HABIT AND DISTRIBUTION. Colour of adult female pinkish or dull red-brown, lightly dusted with wax and with wax projections at anterior and posterior ends of body. Described originally in nests of Formica picea amongst sphagnum moss in swampy ground. ENGLAND. Hampshire : New Forest, Matley Bog (H. K. Donis- thorpe) and again in the New Forest, July, 1918. This is the only record for Britain but Reyne has recently recorded it from Holland. RECOGNITION CHARACTERS. Body elongate oval about 4 mm. long, anal lobes well developed. Antennae 8-segmented, total length 400-450 microns. Legs normal, claw with a distinct denticle. Trochanter + femur 300-310 microns, tibia -f- tarsus 335 microns. Labium 75-90 microns long. Anterior and posterior ostioles present, lips each with 2-3 setae and 6-8 trilocular pores. Anal ring with 2 rows of pores and 6 setae about twice length of diameter of ring. Cerarii number- ing 14 distinct pairs, those missing being on the meso- and metathorax and second abdominal segment. Each cerarius with 2 lanceolate setae and a group of trilocular pores. Circuli 2-3 in number lying on the third, fourth and occasionally fifth abdominal segments. Circulus on segment III very small with a rounded projection ; circulus on segment IV slightly larger with projection flattened apically ; circulus on segment V, when present, minute. Dorsal surface with minute setae. Trilocular pores evenly distributed. Tubular ducts of one size only, each with oral collar barely perceptible, arranged in a wide band across the meso- and metathorax and each abdominal segment. Ventral surface with a stout pair of apical setae longer than anal ring setae and long single marginal setae on abdominal segments which become progressively shorter anteriorly. Body setae slender but much longer than on dorsum except for a few minute lanceolate setae around margins. Multilocular disc pores on sixth and posterior segments only ; numerous on segments IX + X and at anterior and posterior edges of VII and VIII ; a transverse row on posterior edge of segment VI. Tubular ducts of two sizes. A larger type, similar to those on dorsum, arranged singly or in pairs on margins of segments VI-VIII. A smaller type in marginal groups on segment IV and posterior segments, becoming fewer anteriorly. Small numbers also around margins of anterior abdominal segments and thorax and in median areas of thorax. Quinquelocular disc pores very few between anterior coxae, clypeus and labium and an occasional pore on mesothorax. Trilocular pores evenly distributed. NOTES. The distinguishing features of this species are the 8-segmented antennae, the reduced number of cerarii and the small peculiar circuli which are variously knobbed. D. J. WILLIAMS . ,. / . *:' ;' :#; './;. /' **/..'' ' ' * ''.'"'',>' , ,' f ' .^^/v-:'.-^. :.' o FIG. 13. Phenacocats sphagni (Green). THE BRITISH PSEUDOCOCCID AE 39 PLANOCOCCUS Ferris Planococcus Ferris, 1950 : 164. Planococcus Ferris, Ezzat & McConnell, 1956 : 60. A genus erected by Ferris for a number of species, the essential characters being the presence of an anal bar on the ventral surface of each anal lobe, 18 pairs of cerarii, these without auxiliary setae, tubular ducts with oral rim entirely lacking. Planococcus citri (Risso) Dorthesia citri Risso, 1813 : 416-418. Pseudococcus citri (Risso), Fernald, 1903 : 99. Planococcus citri (Risso), Ferris, 1950 : 165. Planococcus citri (Risso), Ezzat & McConnell, 1956 : 65. Newstead (1903) described an insect under the name Dactylopius citri but the specimens are undoubtedly Pseudococcus latipes Green. The only specimens seen from Britain are from greenhouses in ENGLAND from various localities and hosts. Excellent illustrations are available in the works by Ferris and Ezzat & McConnell. PSEUDOCOCCUS Westwood Pseudococcus Westwood, 1840 : 118. Pseudococcus Westwood, Ferris, 1950 : 170. Type of genus Coccus adonidum Linnaeus. The limits of this genus were defined by Ferris and the essential features are the presence of oral rim ducts, at least on dorsum, and 16 or 17 pairs of cerarii with auxiliary setae. There are no native British species and, although P.fragilis Brain occurs in the open in the southern counties, it has been introduced. The others are all greenhouse species. After remounting most of the specimens at hand, it is evident that all those identified and recorded as P. comstocki (Kuwana) from imported bananas should be referred to Dysmicoccus alazon recently described by Williams (1960). Specimens identified as P. maritimus (Ehrhorn) should be referred to P. latipes Green (=P. malacearum Ferris). Evidence in recent years suggests that P. latipes is a widespread species and may have been confused with P. maritimus and P. comstocki. A key to the British species is given below. 1 With not more than a single oral rim duct dorsally near each of most of cerarii. Multi- locular disc pores in transverse rows on most abdominal segments ... 2 - With 2-3 oral rim ducts of different sizes dorsally near each of most of cerarii. Multi- locular disc pores about vulva only ...... adonidum (Linnaeus) 2 With a large oral rim duct dorsally, posterior to each frontal cerarius. Anal lobe cerarii placed near inner edge of an area of sclerotization . . . latipes Green - Without large oral rim duct dorsally posterior to each frontal cerarius. Anal lobe cerarii placed near the centre of surrounding sclerotized area . . fragilis Brain 40 D. J. WILLIAMS Pseudococcus adonidum (Linnaeus) Coccus adonidum Linnaeus, 1766 : 740. Dactylopius longispinus Targioni, 1867 : 1-87. Dactylopius longispinus Targioni, Newstead, 1903 : 168. Pseudococcus longispinus (Targioni), Fernald, 1903 : 104. Pseudococcus adonidum (Linnaeus), Ferris, 1950 : 174. In Britain, a greenhouse species only and, apparently, not so common as hitherto supposed. ENGLAND. Cambridgeshire : Cambridge, fern, 17. x. 1935 (H. C. James). Berkshire : Reading, Phormium tenax, 24.viii.i948 (M. I. Crichton). Surrey : Kew, Royal Botanic Gardens, Stangeria sp., 7 . v . 1896. SCOTLAND. Midlothian : Edinburgh, Royal Botanic Gardens, Cycas sp. (R. S. MacDougall). Pseudococcus fragilis Brain Pseudococcus fragilis Brain, 1912 : 186. Pseudococcus gahani Green, 1915 : 180. Pseudococcus gahani Green, Green, 1920 : 120. Pseudococcus gahani Green, Green, 1921 : 151. Pseudococcus gahani Green, Green, 1931 : 100. Pseudococcus fragilis Brain, Essig, 1942 : 351. Pseudococcus gahani Green, Ferris, 1950 : 180. Pseudococcus fragilis Brain, De Lotto, 1958 : 96. Numerous specimens have been examined from various localities in ENGLAND, SCOTLAND, WALES and CHANNEL ISLANDS, some from greenhouses and others living in the open, especially in the southern counties. There is an excellent description and illustration under the name P. gahani in the work by Ferris. Pseudococcus latipes Green Dactylopius citri (Risso), Newstead, 1903 : 164. (Misidentification.) Pseudococcus longispinus var. latipes Green, 1917 : 264. Pseudococcus maritimus (Ehrhorn), Green, 1920 : 121. (Misidentification.) Pseudococcus maritimus (Ehrhorn), Green, 1921 : 151. (Misidentification.) Pseudococcus maritimus (Ehrhorn), Green, 1928 : 31. (Misidentification.) Pseudococcus maritimus (Ehrhorn), Green, 1931 : 99. (Misidentification.) Pseudococcus malacearum Ferris, 1950 : 185 (syn. n.). This species is probably the commonest of the greenhouse mealy-bugs in Britain. It was first described as a variety of P. longispinus and later Green regarded it as being identical with P. maritimus but it is quite distinct from both. A detailed description has been given by Ferris under the name P. malacearum and there seems to be little doubt that it is the same as P. latipes. The most striking feature is the anal lobe cerarius with two conical setae surrounded by a crowded mass of pores. This cerarius is situated at the inner edge of an oval sclerotized area which extends posteriorly to the base of the apical seta. Very often there is a small prolongation at the anterior edge of the sclerotized area. Specimens are at hand on a wide variety of hosts from many greenhouses in ENGLAND, WALES, SCOTLAND and CHANNEL ISLANDS. THE BRITISH PSEUDOCOCCID A E 41 RHIZOECUS Kiinckel d'Herculais Rhizoecus Kiinckel d'Herculais, 1878 : 163. Rhizoecus Kiinckel d'Herculais, Hambleton, 1946 : 50. Rhizoecus Kiinckel d'Herculais, Ferris, 1953 : 426. Type of genus Rhizoecus falcifer Kiinckel d'Herculais. All the hypogeic mealy-bugs in Rhizoecus and related genera have been studied in great detail by Hambleton. Differences in number of antennal segments, the lengths of the claw digitules and the presence or absence of eyes have led Hambleton to place some of the following species in the genera Ripersiella Tinsley and Morrisonella (=Coccidella Hambleton). In the present work all species are left in the genus Rhizoecus following the definition by Ferris (1953) . Six species are known from Britain and may be identified from the key. 1 Circulus absent ............ 2 Circulus present ............ 3 2 (i) Antennae 5-segmented, abdominal tergites each with 10-16 tritubular pores falcifer Kiinckel d'Herculais Antennae 6-segmented, abdominal tergites each with 2 or 3 tritubular pores at most dianthi Green 3 (i) Multilocular disc pores present on venter, bitubular pores present halophilus (Hardy) Multilocular disc pores absent on venter, tritubular pores present ... 4 4 (3) With some tritubular pores on median and submedian areas of dorsum, labium 60-85 microns long ........... 5 With a total of no more than 4 tritubular pores on dorsal margins only, labium 90-105 microns long ........ elongatus Green 5 (4) Labium 60-70 microns long ........ albidus Goux Labium 80-85 microns long ....... cacticans (Hambleton) Rhizoecus albidus Goux (Text-fig. 14) Ripersia halophila (Hardy), Green, 1917 : 262. (Misidentification.) Rhizoecus (Pararhizoecus) albidus Goux, 1942 : 40. HABIT AND DISTRIBUTION. In life these insects are white and so small as to resemble Collembola, for which they may be mistaken. They feed in the soil on the fine rootlets of grasses and often do extensive damage. The species was first described from the roots of Festuca sp., at Bessenay, France. Material is at hand from the following localities in Britain : ENGLAND. Hertford- shire : Rothamsted, 1936. Shropshire: Newport, 24.^.1939 (H. C. F. Newton). Staffordshire: 1947 (H. C. F. Newton) ; Newcastle, ix.igGo. Surrey: Camberley (E. E. Green); Egham, xii.1959 (K. L. Boratynski). Herefordshire: Hereford, i.i932 (H. E. Durham). RECOGNITION CHARACTERS. A small elongate-oval species measuring approximately 1-5 mm. long. Posterior end of body rounded. Anal lobes poorly developed, each with i long ventral seta and 2 long dorsal setae, appearing as a group of 3. Eyes small. Antennae 6-segmented, geniculate, length 165-170 microns. Legs well developed, trochanter + femur 120-130 microns, tibia + tarsus 130-135 microns ; claw long and slender with claw digitules as long as or slightly longer than claw, with a very minute apical knob. Labium 60-70 microns long. Ostioles well developed, lower lip of each posterior pair without setae or trilocular pores ; other lips each D. J. WILLIAMS FIG. 14. Rhizoecus albidus Goux. THE BRITISH PSEUDOCOCCI D AE 43 with 2-4 setae and 4-7 trilocular pores. Circulus present within borders of segment IV, heavily sclerotized and cone shaped with distal circular plate containing about 7 circular areas. Anal ring rather large in comparison to size of body ; anal ring setae about twice length of ring at its greatest diameter and about same length as apical setae. Dorsal surface with numerous short pointed setae and forming distinct groups on thorax and head. Trilocular pores following the general distribution of the setae. Tritubular pores not numerous, there being rarely more than 3 on any segment of the abdomen or thorax and sometimes only a single one on mid-line ; tending to be scattered on head. Some very minute tubular ducts present on abdominal segments, these very simple and heavily sclerotized ; some segments entirely without ducts and others with at most 6. Ventral surface with a more or less quadrate sclerotized area containing 4 marginal setae just anterior to clypeus. Body setae short and slender. Multilocular disc pores absent. Trilocular pores sparse. The setae and trilocular pores forming groups on thorax and head. Tritubular pores very few, there being a single marginal pore on some of posterior abdominal segments, occasionally one on thorax and one between antennal bases. Small tubular ducts, similar to those on dorsum, arranged 2-6 across some of posterior abdominal segments. NOTES. Goux placed this species in the subgenus Pararhizoecus because it possesses a circulus similar to that of the type species R. (Pararhizoecus) petiti Goux. It is left in Rhizoecm following the definition of this genus by Ferris. Dr. Harold Morrison has kindly examined specimens of this species and has given valuable comments on its differences with R. cacticans and R. elongatus. Rhizoecus cacticans (Hambleton) Rhizoecits elongatus Green, Green, 1926 : 174 (in part as a misidentitication). Ripersiella cacticans Hambleton, 1946 : 64. Rhizoecus cacticans (Hambleton), Ferris, 1953 : 432. Specimens examined, all from greenhouses, include the following : ENGLAND. Hampshire : Bournemouth, Phyllocactus sp. (as a misidentification of R. elongatus). Isle of Wight: Sandown, roots of cactus, 11.1949 (E. Elkan). Essex: Laindon, Mammillaria sp., roots, xii.1928 (G. Fox-Wilson). This species belongs to a group similar to R. albidus and R. elongatus. All are devoid of multilocular disc pores and possess small sclerotized tubular ducts. It comes closest to R. albidus but differs mainly in the length and shape of the labium (see key). Ferris has redescribed and illustrated this species. Rhizoecus dianthi Green (Text-fig. 15) Rhizoecus dianthi Green, 1926 : 175. Morrisonella dianthi (Green), Hambleton, 1946 : 23. Coccidella dianthi (Green), Hambleton, 194611 : 177. HABIT AND DISTRIBUTION. Appearance in life not known. This species is known only from the roots of various plants in greenhouses. It was described from Dianthus plumarius and D. barbatus, ENGLAND, Surrey, Wisley, Royal Horticultural Society's Gardens, and from other plants in the London area. Collected since from Wisley on other occasions on various plants. Specimens have also been seen from Hampshire: Salisbury, Pelargonium sp. roots, viii . 1926 (G. Fox- Wilson). Somersetshire : Taunton, Adiantum sp., 7 . iii . 1904. 44 I). J. WILLIAMS I'^jo. 15. Khizoecus dianthi (ireen. THE BRITISH PSEU DOCOCC1 D A E 45 RECOGNITION CHARACTERS. Body broadly oval, length about 2 mm. Anal lobes poorly developed, each with a long ventral apical seta and 2 slightly shorter dorsal setae. Antennae 6-segmented about 170-175 microns long. Eyes present, very small. Legs normal for the genus, slender ; posterior coxae with a few large oval areas ; trochanter + femur 145-155 microns, tibia -|- tarsus 145-155 microns. Labium 85-95 microns long. Claw slender with very short pointed digitules. Ostioles with inner edges of lips sclerotized and with 2-4 setae and 5-8 trilocular pores on each lip. Circulus absent. Anal ring inclined to ventral surface when mounted on the slide. Dorsal surface with numerous short slender setae. Trilocular pores evenly distributed. Tritu- bular pores sparse, there being from 2-4 on some abdominal segments and absent entirely on other segments ; occasional pores present on thorax and head. Ventral surface with short setae similar to those on dorsum. Multilocular disc pores few on posterior abdominal segments only. Segment VII with i or 2, VIII with 4-7, IX + X with 3-6, there being scarcely more than 12 altogether. Tubular ducts absent. Trilocular pores distributed fairly evenly. Tritubular pores not constant in position although there is often a single marginal pore present on one of posterior abdominal segments and a single pore on margins of pro- and metathorax. NOTES. This species comes very close to R. cyperalis (Hambleton) described from El Salvador and both may be identical. Rhizoecus elongatus Green (Text-fig. 16) Rhizoecus elongatus Green, 19250 : 174. Rhizoecus mesembryanthemi Green, 1931 : 103 (syn. n.). Morrisonella elongata (Green), Hambleton, 1946 : 25. Morrisonella mesembryanthemi (Green), Hambleton, 1946 : 33. Coccidella elongata (Green), Hambleton, 19460 : 177. Coccidella mesembryanthemi (Green), Hambleton, 1946^ : 177. HABIT AND DISTRIBUTION. Appearance in life not known. A greenhouse species described from the roots of Phyllocactus sp., ENGLAND, Hampshire, Bournemouth. Recorded also from the roots of Mesembryanthemum sp., Surrey : Oxted (Type of R. mesembryanthemi). These are the only records from Britain but specimens are also at hand, collected by Dr. A. Reyne from Holland, Zeist Utrecht, on Aloe variegata roots. RECOGNITION CHARACTERS. A small elongate species with parallel sides attaining a length of 2 mm., posterior end rounded, anal lobes with i long ventral seta and 2 slightly shorter dorsal setae. Antennae 6-segmented, about 240 microns long. Legs normal for the genus, claw slender and elongate with claw digitules either same length or slightly longer than claw, with minute apical knob ; trochanter + femur 165-175 microns, tibia + tarsus 190 microns. Labium elongate, about 90-105 microns long. Eyes present, very small. Dorsal ostioles fairly well developed ; lower lip of each posterior pair with about 4 trilocular pores and without setae ; all other lips with 2-4 setae and about 4 trilocular pores. Cerarii absent. Circulus within borders of fourth abdominal segment, heavily sclerotized in the form of a truncated cone, wider than deep, the distal circular plate with numerous subcircular areas. Anal ring rather large for size of body, with 6 setae about twice length of diameter of ring and same length as apical setae. Dorsal surface of body with numerous short slender setae and trilocular pores, both evenly distributed on abdomen and metathorax but anteriorly forming large groups so that there are some areas entirely clear. Minute tubular ducts present on thorax and abdomen ; each in the form of a simple sclerotized internal tube ; majority of segments with, at most, about 6-8 4 6 D. J. WILLIAMS o FIG. 1 6. Rhizoecus elongatus Green. THE BRITISH PSEUDOCOCCI D AE 47 in a transverse row. Tritubular pores sometimes absent entirely or more often with i or 2 on margins of each side of body or on one side only, there being usually one on head and others on some abdominal segments. Ventral surface with a small sclerotized plate anterior to clypeus. Short slender setae and trilocular pores numerous on abdomen but anteriorly they become sparse and form definite groups. Multilocular disc pores and tritubular pores absent. Minute tubular ducts, similar to those on dorsum, very sparse, there being 2-8 in transverse rows on abdominal segments and occasional ducts on thorax. NOTES. This is a distinctive species with reduced numbers of tritubular pores. In his original description, Green stated that these pores were absent but in the speci- mens available this condition is very rare as there are usually one or two present on dorsum. Green's statement of the two different sized limbs in the type slide was due to the presence also of specimens of R. cacticans. He also stated, in his description of R. mesembryanthemi, that the body was completely devoid of setae. The original material has numerous setae and the specimens are identical with R. elongatus. Rhizoecus falcifer Kiinckel d'Herculais Rhizoecus falcifer Kiinckel d'Herculais, 1878 : 164. Riper sia terrestris Newstead, iSgsa : 213. Ripersia terrestris Newstead, Newstead, 1903 : 190. Rhizoecus decoratus Green, 1926 : 177. Rhizoecus decoratus Green, Green, 1928 : 31. Rhizoecus decoratus Green, Green, 1930 : 10. Rhizoecus decoratus Green, Green, 1931 : 102. Rhizoecus terrestris Newstead, Green, 1931 : 102. Rhizoecus decoratus Green, Green, 1934 : ITI - Rhizoecus falcifer Kiinckel d'Herculais, Hambleton, 1946 : 53. Rhizoecus falcifer Kiinckel d'Herculais, Ferris, 1953 : 444. This species is now known from many parts of the world. In Britain it is found only in greenhouses on roots of numerous plants and is, apparently, quite common. Formerly known in Britain under the names Rhizoecus terrestris and R. decoratus, it was shown by Hambleton that these were the same as R. falcifer. For an illustration, see the work by Ferris. British specimens examined include the following : ENGLAND. London : palm roots, 1895 (C. O. Waterhouse) (terrestris type). Yorkshire : Hull, Eastington, roots of Abutilon sp., iv.i925 (decoratus type). Lancashire : Fallowfield, Car ex sp., roots, I9.viii.i926 (J. H. Watson). Surrey : Wisley, Royal Horticultural Society's Gardens, Dracaena sp. roots, 6.iii.i928 (G. Fox- Wilson), roots of various plants, 5. v. 1953 (D. J. Williams) ; Kew, Royal Botanic Gardens, 2.ii.i932 (G. Fox- Wilson) ; Richmond, Gardenia roots, xii.igso. Warwickshire: Studley, lily roots, 27. v. 1935 (J. F. Perkins). IRELAND. Dublin, Adiantum sp., roots, iii.i9oi. Rhizoecus halophilus (Hardy) (Text-fig. 17) Coccus halophilus Hardy, 1868 : 136, 137. Dactylopius radicum Newstead, 18956 : 235 (in part, misidentification). Ripersia halophila (Hardy), Newstead, 1903 : 192. D. J. WILLIAMS ' - : ' ' . rv ./ FIG. 17. Rhizoecus halophilus (Hardy). THE BRITISH PSEUDOCOCCID AE 49 Ripersia halophila (Hardy), Green, 1921 : 191. Rhizoecus halophila (Hardy), Green, 1926 : 174. HABIT AND DISTRIBUTION. The reference to this species has long since been for- gotten and as it is in a journal which may not be readily available, the full original description is given below. " 6. Coccus halophilus, J. H. The Cocci offer few tangible specific characters. The present species apart from its peculiar habitudes cannot be readily discriminated by words. It is scarcely a quarter of a line long, oval, opaque white, without a hard scale, abundantly supplied with a white secretion. Found on the steep sea-banks near Fastcastle [SCOTLAND : Berwickshire] among the roots of Ligusticum Scoticum, and Rhodiola rosea ; and afterwards on the roots of Statice A rmeria in the grey wacke cliffs near Siccar Point. In both cases it follows the long fibrils minutely interwoven through the loose slaty debris." Newstead has described the insect as pure white and with two appendages at the caudal extremity. It feeds only on the roots and is, apparently, not associated with ants. The known distribution is as follows : ENGLAND. Norfolk : Blakeney Point, roots of Armeria maritima, vii.igzo (E. E. Green). Isle of Man : Port Erin, roots of grass, 21 .ix . 1918 (R. Newstead). SCOTLAND. Fifeshire : Isle of May, roots of grasses, ix.i9i3 (W. Evans). Inverness-shire : (Outer Hebrides) St. Kilda, grass roots, vi. 1902 (R. Newstead). Ross and Cromarty : Swordale, roots of Calluna sp., 21.1.1921 (D. J. Jackson). WALES. Anglesey: Puffin Island, on Armeria maritima. IRELAND. Donegal: among turf, viii.1942 (J. Lister). RECOGNITION CHARACTERS. Adult female ovate, about 1-5 mm. long. Posterior end with poorly developed anal lobes, each with i long ventral apical seta and 2 smaller dorsal setae. Antennae 6-segmented, total length approximately 155-170 microns. Legs normal, trochanter -f femur 115-130 microns, tibia + tarsus 130-145 microns, claw with slender digitules about same length or longer than claw with very small knob at apex. Labium about 75 microns long. Eyes present, minute. Ostioles well developed, inner edges of lips sclerotized and each lip with about 2 setae and 2 or 3 trilocular pores ; occasionally without setae. Circulus present within borders of fourth abdominal segment, sclerotized and small, in form of truncate cone, wider than deep, distal surface with minute circular areas. Anal ring with 6 setae twice length of its diameter and about same length as apical setae. Dorsal surface with slender setae of various lengths but mostly small. Trilocular pores not numerous. Tubular ducts small and slender without oral collar, in transverse rows of up to 8 on abdominal segments and becoming scattered on thorax and head. Bitubular pores present, very sparse, there being a marginal series of about 8 on each side of body and 2 or 3 on midline. Ventral surface with short slender setae but tending to be longer on posterior abdominal segments, not numerous. Trilocular pores sparse. Bitubular pores absent. Tubular ducts, similar to those on dorsum, very few, situated in transverse rows on abdominal segments and becoming scattered on thorax and head. Multilocular disc pores on seventh and posterior segments only, there being scarcely more than 50 altogether but some specimens with as few as 30. NOTES. The identification of this species is based on those made by Newstead and Green. It comes very close to Rhizoecus (Pararhizoecus] petiti described by Goux (1941^) another species with bitubular pores but in this case the multilocular disc pores are much more numerous and are situated on the fifth and posterior segments whereas in R. halophilus they are present on the seventh and posterior segments. ENTOM. 12, 1. 4 50 D. J. WILLIAMS SACCHARICOCCUS Ferris Saccharicoccus Ferris, 1950 : 216. Type of genus Dactylopius sacchari Cockerell. RECOGNITION CHARACTERS. Pseudococcidae with y-segmented antennae. Two pairs of dorsal ostioles present. Circulus longer than wide, situated across the segmental line between fourth and fifth abdominal segments, medially constricted. Legs without a denticle on the claw. Minute irregular pores present on the surrounding derm near the attachment of the posterior coxae. Tubular ducts either few on ventral side of abdomen or numerous on both surfaces. Multilocular disc pores on dorsum and venter. Cerarii i pair, on anal lobes only. NOTES. This genus was erected for the single species Dactylopius sacchari, having many characters similar to those of Trionymus. The description given by Ferris has been modified to cater for the species described below as new. One of the striking features of the new species is the large number of small irregular-shaped pores near the attachment of the posterior coxae. This character is shared also by S. sacchari but has, apparently, been overlooked. An examination of many correctly stained specimens of S. sacchari from various localities, shows that these pores are always present. The long stout marginal setae on the abdomen of S. sacchari are probably only of specific value and have been excluded from the generic definition as given by Ferris. Saccharicoccus penium sp. n. (Text-fig. 18) HABIT AND DISTRIBUTION. Description in life not known. Found at the base of grasses, ENGLAND, Hampshire, Yateley, 25. ix. 1926 (E. E. Green). RECOGNITION CHARACTERS. Adult female elongate, with more or less parallel sides, attaining a length of 3-5 mm. Anal lobes moderately developed. Antennae y-segmented, small, about 240-250 microns long. Legs small and slender, trochanter -f- femur 150-170 microns, tibia + tarsus 165-175 microns. Labium about 70 microns long. Anterior and posterior ostioles poorly developed, each lip with 2-3 trilocular pores and lacking setae. Circulus large, longer than wide with sides constricted, hour-glass shaped. Cerarii represented by anal lobe pair only, each with 2 short conical setae set close together, surrounded by a group of about 7 or 8 trilocular pores and accompanied by a single auxiliary seta. Anal ring with 6 setae about twice as long as diameter of ring. Dorsal surface with short pointed setae, not numerous. Trilocular pores with an even distri- bution. Multilocular disc pores forming definite transverse rows at posterior edges of segments V-VIII. Elsewhere on the body they tend to be scattered, although there is a noticeable concen- tration on the head margin and they are absent or nearly so in the median areas of the thorax. Tubular ducts of 2 types. A smaller type, slender, without any appreciable oral collar, in trans- verse rows in the middle of metathorax and abdominal segments. A larger type of duct, each with a large collar and a larger flange-shaped membranous ring arising from the inner edge of the collar, situated in transverse rows on segments VI-VIII and in a small group on anal lobes. Others present around head margins and an occasional one present elsewhere on the body. Ventral surface with a pair of apical setae only slightly longer than anal ring setae. Body setae not numerous, all short and slender but tending to be longer than those on dorsum, especi- ally in median areas. Minute simple pores of different shapes and sizes clustered near posterior coxae from which they extend laterally and posteriorly to segment III. Trilocular pores evenly distributed, sparse. Multilocular disc pores abundant in transverse rows at posterior edges of segments V-VIII. They are also numerous on segments IX + X, at anterior edges of segments THE BRITISH PSEUDOCOCCIDAE o o FIG. 18. Saccharicoccus peniiuu sp. n. 52 D. J. WILLIAMS VI VIII and in a submarginal zone around body. Elsewhere they become scattered. Tubular ducts of same 2 sizes as on dorsum. A smaller type mainly in transverse groups in middle of segments V VIII. A larger type numerous in marginal groups on abdominal segments, sometimes extending to median areas especially on posterior abdominal segments. Present also around the submargins of thorax and head in close association with the multilocular disc pores. NOTES. This species differs from 5. sacchari in possessing much more numerous multilocular disc pores and tubular ducts. The minute irregular pores tend to be concentrated lateral and posterior to the hind coxae whereas in 5. sacchari they are mostly situated just anterior. SPILOCOCCUS Ferris Spilococcus Ferris, 1950 : 219. Spilococcus Ferris, McKenzie, 1960 : 755. Ferris erected this genus for species with oral rim ducts and with the cerarii lacking auxiliary setae. As stated in the discussion on Atrococcus, McKenzie has limited the genus to those species possessing from 6-17 pairs of cerarii and has erected the genus Chorizococcus for species with from 0-4 pairs of cerarii. Although Atrococcus is distinct in having species with a black body content and with the cerarii on abdomen only, the position is complicated with Spilococcus cactearum McKenzie, a species with an obvious relationship to other species of Spilococcus yet possessing a black body content. It is left in this genus for the time being pending further research. Apart from S. cactearum, the other British species, 5. filicicola (Newstead), is placed here as a temporary measure. Spilococcus cactearum McKenzie (Text-fig. 19) Pseudococcus mamillariae Bouche, Green, 1930 : 9. (Misidentification.) Spilococcus cactearum McKenzie, 1960 : 757. HABIT AND DISTRIBUTION. According to McKenzie the adult female is covered with an even, light grey secretion. When boiled in caustic potash the body content turns black or blue-black. So far as is known, the species is confined to the Cactaceae. Specimens have been examined as follows : ENGLAND. Essex : Laindon, vi.igzS (T. M. Endean). Middlesex : Pinner, v.ig^j (R. E. Elkan). RECOGNITION CHARACTERS. Adult female broadly oval attaining a length of 2-5 mm. Anal lobes well developed. Antennae 8-segmented, 310-335 microns long. Legs normal, posterior coxae with a few translucent pores, posterior tibia with a small group of such pores ; claw with a denticle ; trochanter -f- femur 215-240 microns, tibia + tarsus 240-250 microns. Labium about 70 microns long. Anterior and posterior ostioles present, inner edges of lips sclerotized, each lip with 2 or 3 setae and about 6 trilocular pores. Circulus rather large, oval. Anal ring with a double band of pores and 6 setae about twice length of its diameter. Cerarii numbering 9-14 pairs, those on head and thorax variable in number but there are usually 7 pairs present on abdomen. Anal lobe cerarii each with a pair of slender conical setae set close together and accompanied by 5 or 6 trilocular pores and 3 or 4 auxiliary setae, the area at base of cerarian setae lightly sclerotized. Anterior cerarii each -with setae more slender, sometimes wide apart but their presence can be detected by a group of 3 or 4 trilocular pores, without auxiliary setae. THE BRITISH PSEUDOCOCCI D AE 53 FIG. 19. Spilococcus cactearum McKenzie. 54 D. J. WILLIAMS Dorsal surface of body with very small slender setae, not numerous. Trilocular pores evenly distributed. Tubular ducts with oral rim on segment VIII and all anterior segments, arranged in single transverse rows on abdomen, there being rarely more than 6 on each segment ; on the thorax and head they become scattered. Ventral surface with a pair of long apical setae longer than anal ring setae. Other setae slender but usually longer than those on dorsum especially on median areas, not numerous. Multilocular disc pores on abdomen only, confined to segments posterior to circulus. Arranged in transverse rows at posterior edges of segments and at anterior edges of segments VII and VIII. Tubular ducts with oral collar of two sizes. A small type, very few in transverse rows in middle of some of posterior abdominal segments and on anal lobes, an occasional duct sometimes present on thorax. A larger type in transverse rows on fourth and posterior segments immediately anterior to multilocular disc pores and usually continuous with noticeable marginal groups. One or two also present on thorax. Tubular ducts with oral rim arranged singly or in pairs on margins of segments IV-VIII but forward to metathorax they are more numerous, often with 2 or 3 on each segment. There is usually a pair between antennal bases and often i in median area of thorax. Trilocular pores not numerous but with an even distribution. NOTES. This species has often been misidentified as Pseudococcus mamillariae based on the description of Coccus mamillariae Bouche. It has been shown by McKen- zie, on the basis of a report by Lindinger (1934), that it cannot be the species described by Bouche and consequently McKenzie has described this black cactus-infesting species as new. British specimens have been checked against material from France collected by A. Balachowsky and from Italy collected by G. Paoli. Spilococcus filicicola (Newstead) (comb, n.) (Text-fig. 20) Riper sia filicicola Newstead, 1898 : 96. Ripersia filicicola Newstead, Newstead, 1903 : 184. HABIT AND DISTRIBUTION. Newstead stated that in life this insect was pale ochreous yellow or red-pink ; farinose, with broad irregular wax appendages on the margin of the abdominal segments. The insects also secrete slender iridescent filaments radiating from the sides of the body. Known only from a greenhouse in the Royal Botanic Gardens, Kew, ENGLAND, on the fronds of Trichomanes spicatum, 27 . ii . 1897. It is possible that it will be found eventually in Central or South America. RECOGNITION CHARACTERS. A broadly oval species, length of available specimens 1-5 mm., anal lobes well developed. Antennae 6-segmented, 240 microns long. Legs normal, stout, trochanter + femur 1 80 microns, tibia + tarsus 170 microns. Labium 105 microns long. Circulus absent. Ostioles well developed, inner edges of lips sclerotized, each lip with 0-2 setae and 4-6 trilocular pores. Anal ring with a double band of pores and 6 setae about twice length of ring at its greatest diameter. Cerarii numbering 10 pairs, there being 2 pairs on head and 8 pairs on abdomen. Anal lobe cerarii each with a pair of stout conical setae and a small group of about 7 or 8 trilocular pores accompanied by 6 auxiliary setae and a few other trilocular pores all on a large oval sclerotized plate the same area as anal ring. Anterior cerarii each with 3-7 trilocular pores and a pair of small conical setae except the frontal pair which have 3 conical setae, all without auxiliary setae. Dorsal surface sparsely beset with short slender setae. Trilocular pores evenly distributed, not numerous. Tubular ducts present, of oral rim type, rather large. Each duct often with 1-3 trilocular pores and i or 2 setae immediately surrounding base of oral rim but not attached to it, although some ducts entirely without these. In the 2 specimens at hand there are 7 ducts THE BRITISH PSEUDOCOCCID AE 55 *fo FIG. 20. Spilococcus filicicola (Newstead). 56 D. J. WILLIAMS equispaced on either side of margin, 2 on mid-line of thorax and a pair in submedian areas of metathorax. Ventral surface with small triangular sclerotized area on each anal lobe and an apical seta shorter than anal ring setae. Body setae few, short and slender but, for the most part, longer than dorsal setae. Trilocular pores evenly distributed but sparse. Multilocular disc pores in single transverse rows on median area of abdomen only. Tubular ducts with oral collar very few, in transverse rows on segments IV-VII. Tubular ducts with oral rim of 2 types. A single duct, slightly smaller than those on dorsum, but with rim of larger diameter than a multilocular disc pore, present on either side of segment VI. A smaller type of duct, each with a narrow rim of smaller diameter than a multilocular disc pore, present around the margins where they are more numerous on thorax. NOTES. The placing of this species in Spilococcus is tentative as the dorsal sclero- tization on the anal lobes and the very large oral rim ducts are not found on other species in the genus. Although some of the oral rim ducts have one or two setae and some trilocular pores around the base of the rim, this character is not constant. SPINOCOCCUS Borchsenius Spinococcus Kiritchenko, 1931 : 314 (nom. nud.). Spinococcus Borchsenius, 1949 : 393. Type of genus Acanthococcus marrubii Kiritchenko. The main characters of this genus are the 17-18 pairs of cerarii with conical setae, these elevated slightly from the surrounding derm and with 2-10 trilocular pores immediately at the base. Dorsal setae similar in shape and size to cerarian setae, there being usually a row of dorsal cerarii on mid-line. Antennae 8-0,-segmented. Claw with distinct denticle. Ouinquelocular disc pores on ventral surface. Spinococcus calluneti (Lindinger) (Text-fig. 21) Pseudococcus calluneti Lindinger, 1912 : 90. Parapedronia calluneti (Lindinger), Balachowsky, 1954 [ r 953] : 2 3- Spinococcus calluneti (Lindinger), Zahradnik, 1959 : 537. Spinococcus calluneti (Lindinger), Danzig, 1960 : 176. HABIT AND DISTRIBUTION. Apparently confined to Cattuna spp. and Erica spp. where it feeds mainly on the roots. Described originally from Germany and found on two occasions only in Britain as follows : ENGLAND. Cheshire : Chester, roots and flowers of Erica cinerea, Calluna sp., viii. 1922 (R. Newstead). Surrey : Oxshott, Calluna vulgaris roots, x.iQ25 (K. Mansour). RECOGNITION CHARACTERS. Adult female ovate about 1-5 mm. long. Anal lobes moderately developed, set well apart. Antennae 7-8-segmented, 245-320 microns long. Legs normal, claw with a distinct denticle. Trochanter -f- femur 170-180 microns, tibia + tarsus 190-200 microns. Labium 70-90 microns long. Circulus small and round within borders of segment IV. Ostioles present, inner edges of lips sclerotized, each lip usually with 3 trilocular pores and an occasional seta. Anal ring with a double band of pores and 6 setae about twice length of diameter of ring. Marginal cerarii numbering 18 pairs, the cerarian setae on small projections of the derm. Anal lobe cerarii each with 2 conical setae on a large sclerotized plate nearly same size as anal ring, containing about 10 trilocular pores and i or 2 minute setae. Anterior cerarii each with 2 smaller THE BRITISH PS EUDOCOCCI D AE 57 b FIG. 21. Spinococcus calluneti (Lindinger). 58 D. J. WILLIAMS conical setae set close together and with 2-4 trilocular pores immediately around the base, the base of each seta elevated from the surrounding derm. Dorsal surface with setae of various sizes but of similar shape to cerarian setae. Dorsal cerarii each consisting of 2 conical setae situated on mid-line of body, these setae of same size as those of marginal cerarii. Similar sized setae in transverse rows, each with i or at most 2 trilocular pores on or near the basal projection ; occasionally replaced by definite cerarii with 2 setae. Other dorsal setae very small. Multilocular disc pores present in transverse rows on thorax and abdomen and a few scattered on head. Tubular ducts with a similar distribution to multilocular disc pores, a single duct usually situated between 2 multilocular pores. Trilocular pores evenly distributed, not numerous. Ventral surface with apical setae longer than anal ring setae. Other setae slender, of various lengths but usually longer in median areas. Multilocular disc pores in transverse rows on abdomi- nal segments but forming groups towards margins. Marginal groups also present on thorax and i or 2 pores situated near each coxa. Quinquelocular disc pores present in median areas only on head and thorax and all prevulvar abdominal segments. Trilocular pores few, absent in median areas of anterior abdominal segments and thorax. Tubular ducts with oral collar of two sizes. A larger type, similar to dorsal ducts, around the margin, there being usually a single duct between two multilocular disc pores. A smaller type, about half the width, mainly concentrated in median areas of abdomen but some extending laterally among the larger type. An occasional smaller duct also present in median areas of thorax. NOTES. The identity of this species is based on specimens from Erlangen, Germany, collected by H. Schmutterer. TRIONYMUS Berg Trionymus Berg, 1899 : 78. Trionymus Berg, Ferris, 1950 : 251, 1953 : 482. Trionymus Berg, McKenzie, 1960 : 764. Type of genus Westwoodia perrisii Signoret. This genus has been a source of confusion in recent years. It is very close to Dysmicoccus and it is doubtful if the latter will be accepted when further species are described. Ferris laid particular stress on the shape of the circulus which, in Trionymus, should be small and round or oval whereas in Dysmicoccus it should be large and divided by an intersegmental fold. McKenzie has disregarded the shape of the circulus and species with 6 or more cerarii are placed in Dysmicoccus and those with 5 or less are placed in Trionymus. McKenzie's interpretation is accepted here although difficulties arise with T. newsteadi. This species possesses 4 or 5 pairs of cerarii and has close affinities with the genus Dysmicoccus with regard to body form and the shape of the circulus. Furthermore, its host is Fagus and, although there are exceptions, most species of Trionymus are found on grasses. As it has no obvious relationship to its present genus Pseudococcus, it is left in Trionymus for the time being. This is by far the largest British genus and the 9 species may be separated by the following key : 1 Anal lobe cerarii borne on a distinct sclerotized plate as large as or larger than area of anal ring ............ 2 Anal lobe cerarii not borne on a sclerotized plate ...... 5 2 (i) Circulus large, divided by an intersegmental fold .... tomlini Green Circulus small, round or oval, not divided by an intersegmental fold. . . 3 THE BRITISH PSEUDOCOCCID AE 50 3 (2) Multilocular disc pores absent on dorsum except for total of no more than 4-6 on some of last abdominal segments ...... dactytis Green Multilocular disc pores on dorsum in transverse rows ..... 4 4 (3) With 26-45 trilocular pores on the sclerotized plate on anal lobes ; tarsus about half length of tibia perrisii (Signoret) With 70-75 trilocular pores on the sclerotized plate on anal lobes ; tarsus about one-third as long as tibia phalaridis Green 5 (i) With 4 or 5 pairs of cerarii ; circulus large and quadrate-shaped newsteadi (Green) With i or 2 pairs of cerarii ; circulus small and round ..... 6 6 (5) Tubular ducts with the oral collar nearly half total length of duct radicum (Newstead) Tubular ducts with the oral collar very small ...... 7 7 (6) Multilocular disc pores absent on dorsum ..... thulensis Green Multilocular disc pores present on dorsum ....... 8 8 (7) With a single pair of cerarii on anal lobes, cerarian conical setae slender orestes sp. n. With 2 pairs of cerarii, cerarian conical setae on anal lobes short and stout diminutus (Leonardi) Trionymus dactylis Green (Text-fig. 22) Pseudococcus (Trionymus) dactylis Green, 1925 : 523. Trionynius dactylis Green, Green, 1928 : 22. HABIT AND DISTRIBUTION. Appearance in life not recorded. Known only from beneath the leaf sheaths of grasses. CHANNEL ISLANDS. Guernsey : St. Sampson, Dactylis glomerata, ix.ig24 (E. E. Green) (Type) ; Petit Bot Bay, Deschampsia caespitosa, ix.ig2j (F. Laing). ENGLAND. Somersetshire: Cheddar, Dactylis glomerata, viii.1926 (E. E. Green). RECOGNITION CHARACTERS. Body elongate elliptical attaining a length of 5 mm. Anal lobes moderately developed. Antennae 8-segmented, length 380-425 microns. Legs normal, slender, posterior coxae with numerous translucent pores, trochanter -f femur 315-340 microns, tibia -f- tarsus 335-370 microns. Labium 75-80 microns long. Anterior and posterior ostioles present, each lip with 4-6 trilocular pores and usually without setae although at times one may be present. Circulus very small, oval. Anal ring with a double band of pores and 6 setae twice length of diameter of ring. Cerarii numbering 3 or 4 pairs. Anal lobe cerarii each with 2 conical setae on a sclerotized plate, larger in area than anal ring, containing 12 long setae and about 40 trilocular pores. Penultimate cerarii each with 2 smaller cerarian setae accompanied by about 12 trilocular pores and 2 or 3 auxiliary setae and surrounded by a small sclerotized area. Cerarii on segment VII similar but without sclerotized area. Cerarii on segment VI, when present, with i or 2 small cerarian setae and 2 or 3 trilocular pores. Dorsal surface with slender setae of various sizes. Multilocular disc pores either absent entirely or numbering only 3-4 at most on posterior abdominal segments. Trilocular pores numerous. Tubular ducts with oral collar of 2 sizes. A larger type, quite numerous on all segments, tending to form transverse rows on abdominal segments but becoming scattered on thorax and head. A smaller type present on abdomen, sparse, in transverse rows in middle of segments and occa- sionally on thorax. Ventral surface of body with apical setae longer than anal ring setae. Other setae of various sizes and similar to dorsal setae. Multilocular disc pores on fifth and posterior segments only, except for an occasional pore , anteriorly. Tubular ducts of same 2 sizes as those on dorsum. A larger type in transverse groups or rows on fifth and posterior segments and forming rather large groups laterally. Marginal or submarginal groups also present as far forward as head. Occasionally single ducts may be present in median areas of thorax. A smaller type of duct 6o D. J. WILLIAMS o o FIG. 22. Trionymus dactylis Green. THE BRITISH PSEUDOCOCCID AE 61 mainly present on abdomen across the middle of the segments, much fewer than larger type. Trilocular pores with an even distribution. Trionytnus diminutus (Leonard!) Pseudococcus diminutus Leonardi, 1918 : 198. Trionymus diminutus (Leonardi), Ferris, 1950 : 261. Specimens are at hand from CHANNEL ISLANDS, Jersey (G. Fox- Wilson) on Phor- mium tenax to which plant it seems to be confined. It was described from Italy and is now known from New Zealand, U.S.A., Formosa and Russia. Ferris has redescribed and illustrated this species. Trionymus newsteadi (Green) (Text-fig. 23) Pseudococcus newsteadi Green, 1917 : 265. Trionymus newsteadi (Green), Zahradnik, 1959 : 538. HABIT AND DISTRIBUTION. Described as " Body pale purplish grey ; limbs and antennae pale stramineous ; venter thinly, dorsum rather thickly and evenly covered with white mealy secretion ; terminal three or four segments of abdomen with short, stout, waxy tassels." It is known only from beech. ENGLAND. Surrey : Camberley, vii.igid, v.1917 (Type), 15. vi. 1932 (E. E. Green). Buckinghamshire : Chartbridge (E. J. Joseph). Hertfordshire: Berkhamsted, 16.1.1913. Essex: Ep- ping Forest, 25^.1923 (C. L. Withycombe). Sussex : Midhurst, 18^.1946 (W. J. Hall). Berkshire : Silwood Park, 31^.1949 (K. L. Boratynski). RECOGNITION CHARACTERS. Body broadly oval attaining a length of 3 mm., anal lobes moderately developed. Antennae 8-segmented, 340-410 microns long. Legs normal, posterior coxae and tibiae with a few translucent pores. Trochanter -+ femur 260-285 microns, tibia + tarsus 275-305 microns. Labium 105-120 microns long. Circulus large, posterior edge usually shorter than anterior edge. Posterior ostioles present only, each lip with 3 or 4 trilocular pores and apparently without setae. Anal ring with 2 rows of pores and 6 setae, these about twice length of diameter of ring. Cerarii numbering 4 or 5 pairs on abdomen. Anal lobe cerarii each with 2 slender conical setae and about 6 or 7 trilocular pores accompanied by 3 or 4 auxiliary setae, the area around the base of the setae sclerotized. Anterior cerarii on segments VI-VII1 similar but cerarian setae smaller, auxiliary setae absent. Cerarii on fifth segment usually with setae similar to body setae and accompanied by about 3 trilocular pores. Dorsal surface with slender setae. Tubular ducts numerous with deep collar occupying nearly one-third length of duct ; a flange-shaped membranous ring also arising from the inner end of the collar. The ducts and dorsal setae are arranged in definite groups rather than in transverse rows leaving bare areas except for trilocular pores which are more evenly distributed, as in the accompanying diagram. Ventral surface with apical setae longer than anal ring setae. Body setae slender but mainly longer than those on dorsum. Multilocular disc pores confined to abdomen except for occasional pores near the coxae. Fifth segment with about 10-18 pores and posterior segments with trans- verse rows at anterior and posterior edges of segments. Tubular ducts of 2 sizes, a larger type similar to those on dorsum, rather numerous in marginal groups on abdomen and less numerous in groups around the thorax and head. Present also in transverse rows on fourth and posterior segments. A smaller type of duct, similar in all respects to larger type, sparsely distributed in median areas of posterior abdominal segments and occasionally on abdominal margins. Trilocular pores not numerous. 62 D. J. WILLIAMS FIG. 23. Trionyimis newsteadi (Green). THE BRITISH PSE U DOCOCCID AE 63 Trionymus orestes sp. n. (Text-fig. 24) Trionymus pulverarius (Newstead), Green, 1928 : 30. (Misidentification.) HABIT AND DISTRIBUTION. External appearance not known : probably found on the leaf sheaths. ENGLAND. Surrey : Box Hill, Brachypodium sylvaticum, 26. ix. 1921 (E. E. Green) (Holotype^. Somersetshire: Cheddar, Brachypodium sylvaticum, viii.1926 (E. E. Green). RECOGNITION CHARACTERS. An elongate species attaining a length of 3-5 mm. in available specimens. Anal lobes poorly developed. Antennae y-segmented, 275-310 microns long. Legs rather small and slender, posterior coxae with a few translucent pores. Trochanter + femur 200-230 microns, tibia + tarsus 230-260 microns. Labium 75-80 microns long. Ostioles small, each lip with about 3 trilocular pores and without setae. Circulus present, small and oval. Anal ring with a double band of pores and 6 setae, about twice as long as diameter of ring. Cerarii on anal lobes only, each with 2 conical setae set close together and about 5 trilocular pores accompanied by a longer auxiliary seta. Dorsal surface with slender setae of various sizes, not numerous. Multilocular disc pores arranged more or less at anterior and posterior edges of abdominal segments in single or double transverse rows becoming less numerous anteriorly. A few also present in no definite arrangement on thorax and head. Trilocular pores evenly distributed. Tubular ducts with oral collar of 2 types, a larger type in transverse rows on abdomen except on segments IX -j- X ; present also on thorax and head where they have a random distribution. A smaller type, sparse, situated across the middle of abdominal segments except the last. Ventral surface with apical setae longer than anal ring setae. Other ventral setae similar to those on dorsum but tending to be longer in median areas. Multilocular disc pores on posterior edges of segments V-VIII and on anterior edges of segments VI-VI1I, present also on segments IX + X. Small marginal groups extending forward to head. Tubular ducts of two sizes as on dorsum. A larger type present mainly in marginal groups around body and a smaller type in transverse rows on abdomen and sometimes a few on thorax. Trilocular pores not numerous. NOTES. This species is very close to T. caricis McConnell described from Carex tribuloides, Maryland, U.S.A., but differs in the greater number of dorsal multilocular disc pores which tend to form transverse rows on the abdominal segments. In T. caricis they are sparse and scattered. Trionymus perrisii (Signoret) (Text-fig. 25) Westwoodia perrisii Signoret, 1875 : 337. Dactylopius hibernicus Newstead, 1895 : 167 (syn. n.). Trionymus perrisii (Signoret), Berg, 1899 : 78. Dactylopius hibernicus Newstead, Newstead, 1903 : 172 (in part). Dactylopius pulverarius (Newstead), Newstead 1903 : 174 (in part). Pseudococcus pulverarius (Newstead), Green, 1915 : 178. (Misidentification.) Pseudococcus hibernicus (Newstead), Green, 1920 : 120. Trionymus pulverarius (Newstead), Green, 1926 : 182. (Misidentification.) Trionymus hibernicus (Newstead), Green, 1926 : 183. Trionymus pulverarius (Newstead), Green, 1928 : 30. (Misidentification.) HABIT AND DISTRIBUTION. Living at the base of the leaf sheath of grasses. Adult dull yellow to pale purplish, dusted with a fine white powder. Short tassels on last 6 4 D. J. W I J.J.I A MS imi d o ft /'/. '' ,- - /",-V* I I.'- lf. *' . . O fo - - . - - t ' '//' .rtfhi'i /;/ ''.'." l L.O, o' . o.' . Sv'-i;{,v/'i si/./-w r i. ' * I f S> WWJ -& o FIG. 24. Trionymus orestes sp. n. THE BRITISH PSEUDOCOCCID AE 65 two abdominal segments. This is, apparently, a common species in Britain and material has been examined from the following localities : ENGLAND. Berkshire: Silwood Park, Deschampsia caespitosa, Holcus sp., 27.x. 1948, Festuca rubra, 22. ix. 1948, 13. ix. 1953 (K. L. Boratynski). Cheshire : Helsby Hill, Agrostis sp., I. viii. 1896 (R. Newstead). Cumberland: Whinlatter Pass, Deschampsia caespitosa io.viii.i96o (D. J. Williams). Devonshire: Budleigh Salterton, io.ix.i896 (E. E. Green). Durham : Waldridge Fell, 7.viii.i96o (D. J. Williams). Kent: Deal, ix. 1899 (B. Tomlin). Norfolk: Ingoldisthorpe, viii . 1892, (R. Newstead). Somersetshire: Cheddar, viii. 1926 (E. E. Green). Surrey: Guild- ford, 2i.vii.i922 (E. E. Green) ; Camberley, ix.i9i4, 19. ix. 1928, 26. ix. 1930 (E. E. Green) . Yorkshire : Selby, ix . 1918 (E. E. Green) . Hawkesworth, 15 . viii . 1958, 6. viii. 1960 (D. J. Williams). SCOTLAND. East Lothian: Gullane, Aberlady, North Berwick Law, viii. 1925 (E. E. Green). IRELAND. Antrim: Ballintoy, 3.ix.i893 (L. E. Tomlin) (hibernicus type). RECOGNITION CHARACTERS. Adult female elongate oval, up to 4-5 mm. in length. Anal lobes usually well developed. Antennae 8-segmented, 335-340 microns long. Legs normal, posterior coxae with translucent pores, trochanter -f femur 215-260 microns, tibia + tarsus 250-285 microns. Labium about 95 microns long. Anterior and posterior ostioles moderately developed, each lip with 4-6 trilocular pores and rarely with setae. Circulus present, small and oval between fourth and fifth segments. Occasionally a second smaller circulus may be present on the next posterior segment and very rarely up to 4 circuli present in which case the extra ones are minute. Anal ring with 2 rows of pores and 6 setae twice as long as diameter of ring. Cerarii numbering 2 or 3 pairs. Anal lobe cerarii each with 2 conical setae on a sclerotized plate, slightly larger in area than anal ring. This plate also containing about 26-45 trilocular pores and 9 auxiliary setae. Cerarii on segment VIII each with a pair of smaller conical setae and on a small sclerotized plate with 8 trilocular pores and about 2 auxiliary setae. On segment VII cerarii often absent entirely but when present, with either i or 2 conical setae and 2 or 3 trilocular pores and not surrounded by a sclerotized area. Dorsal surface with slender setae. Multilocular disc pores variable in number and distribution. On the abdomen they form transverse rows at the anterior and posterior edges of segments VI-VIII. On the anterior abdominal segments they become sparse and may be missing entirely on some of the edges. On the thorax they become scattered and sometimes they are present on the head. Trilocular pores rather numerous. Tubular ducts with oral collar of 2 sizes. A smaller- sized duct sparse, there being a few across the middle of most abdominal and thoracic segments. A larger type of duct, numerous, forming transverse bands on the abdominal segments. In some specimens they reach from the anterior to posterior edges of most segments but in other specimens they are concentrated in the middle of the segments or towards the posterior edges. On the thorax and head they are less numerous and become scattered. Ventral surface with apical setae longer than anal ring setae. Ventral setae slender but tending to be longer than dorsal setae. Multilocular disc pores numerous in transverse rows at anterior and posterior edges of segments VI-VIII ; present also on segments IX + X and on posterior edge of segment V. Elsewhere on the abdomen they are sparse and may be present or absent around the margins. On the thorax and head they are scattered on median areas and often extend around margins. Trilocular pores evenly distributed. Tubular ducts, of smaller type, present in middle of abdominal segments and in median areas of thorax ; not numerous. A larger type in transverse rows and marginal groups on abdominal segments and extending around body in a marginal or submarginal zone. NOTES. Dr. A. Reyne has very kindly sent specimens of T. perrisii from Holland and these agree with specimens of T. hibernicus described from Britain. Professor N. S. Borchsenius has also kindly examined some British specimens of T. hibernicus ENTOM. 12, I. 5 D. J. WILLIAMS .v- ...v . ,\v. .v\: ; H-'^ .VJ :.->" v .'\.v' . . '" " v> ?ooo- "- o-'- / ^T-r-o' . *;> VJ-P'.S'O'. ,' o. o.o-.oo o 0> . -. O b FIG. 25. Trionymus perrisii (Signoret). THE BRITISH PSE U DOCOCCI D AE 67 and it is his opinion that they are the same as T. perrisii. All of these specimens agree with the illustration of T. perrisii given by Marchal (1908). Continental specimens usually have 3 distinct pairs of cerarii but on at least i specimen from Holland there are only 2 pairs. British specimens usually have 2 pairs of cerarii but the third pair is often represented by a single conical seta and 2 or 3 trilocular pores. Although a single circulus seems to be the more normal condition, some specimens in Britain have 2 and in rare cases up to 4. Trionymus phalaridis Green (Text-fig. 26) Pseudococcus (Trionymus} phalaridis Green, 19250 : 37. HABIT AND DISTRIBUTION. Described as " Colour reddish purple to dark slaty grey ; closely dusted with white powdery secretion. Posterior extremity with four short waxy tassels." Living beneath the leaf sheath and stem. ENGLAND. Surrey : Frimley, 8.ix.i922 (E. E. Green) (Type) ; Camberley, 3O.viii.i92i, 30. ix. 1921 (E. E. Green), all on Phalaris arundinacea. Gloucestershire : ix.ig22 (K. G. Blair). RECOGNITION CHARACTERS. Body elongate, sides subparallel, attaining a length of 6-5 mm. Anal lobes well developed. Antennae 8-segmented, 450-495 microns long. Legs rather long and slender, posterior coxae with a few translucent pores, trochanter + femur 380-395 microns, tibia about 3 times as long as tarsus, measuring together 405-445 microns. Labium 100 microns long. Ostioles present, usually with about 10-15 trilocular pores on each lip of posterior pair and about 4-6 on each lip of anterior pair ; without setae. Circulus oval. Anal ring with a double band of pores and 6 setae over twice length of ring at its greatest diameter. Cerarii on last 2 segments only. Anal lobe cerarii each with 2 conical setae on a large sclerotized plate, larger in area than anal ring and accompanied by 70-75 trilocular pores and 12 or 13 slender auxiliary setae. Penultimate cerarii each with 2 smaller conical setae on a small round sclerotized plate containing about 15 trilocular pores and 5 auxiliary setae. Dorsal surface of body with numerous slender setae of various sizes. Multilocular disc pores arranged in transverse rows at anterior edges of segments V-VIII and with only a few at posterior edges of these segments. On the anterior abdominal segments and thorax they are sparse and become scattered. Trilocular pores numerous and evenly distributed. Tubular ducts with oral collar of 2 sizes. A smaller type, few on abdomen, situated mainly across middle of segments. A larger type abundant, occupying most of the area of segments II-VIII except at anterior edges. On the thorax they become scattered but are well separated between the segments and on the head they lie in definite groups. Ventral surface with a pair of apical setae longer than anal ring setae. Slightly shorter setae present around margins of abdomen. Other ventral setae of various sizes but all slender. Multi- locular disc pores numerous on segments IX + X, in transverse rows at anterior and posterior edges of segments VI-VIII, and on posterior edges of segment V. A few also present on segment IV, around the margins to head and occasionally in median areas of thorax. Trilocular pores numerous. Tubular ducts of same 2 sizes as on dorsum. A smaller type sparse on abdomen and a larger type in transverse rows and marginal groups on the abdominal segments. Present also in groups around the margins to head and a few in median areas of thorax. NOTES. This species comes close to T. perrisii but is usually much larger. The trilocular pores on the sclerotized plate on anal lobes are much more numerous and the tibia is about three times as long as the tarsus whereas in T. perrisii it is only twice as long. 68 \>. J. WILLIAMS o J o o FIG. 26. Trionymns phalaridis Green. THE BRITISH PSEUDOCOCCID AE 69 Trionymus radicum (Newstead) (comb, n.) (Text-fig. 27) Dactylopius radicum Newstead, 18956 : 235. Dactylopius hibernicus Newstead, Newstead, 1903 : 172 (in part, misidentification). Riper sia donisthorpei Newstead, In Donisthorpe, 1907 : 5 (syn. n.). HABIT AND DISTRIBUTION. Living at the base of grasses. Described originally as " pale reddish-pink ... At period of gestation the ? completely envelops herself in a very loose cottony material, in which the pale flesh-coloured ova are laid." ENGLAND. Isle of Man: Port Erin, 21. ix. 1918. Buckinghamshire: Waddesdon, 17. v. 1953 (V. F. Eastop). Kent : Charing, in nest of Ponera contracta (H. Donis- thorpe) (donisthorpei Type) . WALES. Anglesey: Puffin Is., vi. 1895 {radicum Type). RECOGNITION CHARACTERS. Body elongate oval, about 3-5 mm. long. Anal lobes moderately developed. Antennae 7-segmented, 305-335 microns long. Legs normal, slender, hind coxae with a few translucent pores. Trochanter + femur 215-240 microns, tibia + tarsus 225-245 microns. Labium 70-75 microns long. Ostioles poorly developed with 4-7 trilocular pores on each lip and rarely with setae. Circulus very small, oval. Anal ring with a double band of pores and 6 setae longer than ring at its greatest diameter. Cerarii numbering 2 pairs only. Anal lobe cerarii each with a pair of conical setae and about 6 or 7 trilocular pores accompanied by a single auxiliary seta, the area between the cerarian setae sclerotized. Cerarii on segment VIII each with a pair of smaller conical setae and about 4 trilocular pores. Dorsal surface of body with short slender setae, not numerous. Multilocular disc pores very few, scattered at random on thorax and abdomen. Trilocular pores evenly distributed. Tubular ducts arranged in transverse rows on thorax and abdomen and in groups on head, each duct with a large flange-shaped collar occupying nearly half total length of duct. Ventral surface with apical setae longer than anal ring setae. Ventral setae all slender but mainly longer than dorsal setae. Multilocular disc pores numerous on segments IX + X and present in transverse rows at posterior edges and usually on anterior edges of segments V-VIII. Small numbers also on anterior abdominal segments and around the margins to head and one or two in median areas of thorax. Tubular ducts of 2 sizes ; a larger type, similar to dorsal ducts situated in groups around the margins and a few present in median areas of segments V-VIII. A smaller type of duct, similar to the larger type but with inner end rounded, present on abdomen mainly in the median areas. NOTES. When Newstead collected this species he also found some smaller specimens which he thought were the larvae. They were, however, adult females of Rhizoecus halophilus and he mentioned this error in 1903. In this same work he sunk the name Dactylopius radicum as a synonym of D. hibernicus, stating that the " curiously shaped pores or glands " were caused by a parasite. The species is quite distinct and the tubular ducts, with the collar flange-shaped and nearly half the total length of the duct, serve to distinguish this species from all the other British species of Trionymus. Trionymus thulensis Green (Text-fig. 28) Trionymus pulverarius (Newstead), Green, 1926 : 182. (Misidentification.) Trionymus thulensis Green, 1931^ : 267. HABIT AND DISTRIBUTION. Found beneath the leaf sheath and stem of grasses. Described originally from Iceland, VarmahlicJ 1 on Festuca rubra, 3.^.1929 (C. H. Lindroth). British specimens are at hand from the following localities : ENGLAND. 7 o D. J. WILLIAMS o .'^ ;/ .'/.'/:/. \ ! / j- [/../ * * '/ ./ i . ;. .o > - > ^ . . . .' 7* ('/: i'-viVV/U I/.' ; . ' ' "o.' - ' i o FIG. 27. Tn'ow^mws radicum (Newstead). THE BRITISH PSEUDOCOCCI D AE & O o FIG. 28. Trionymus thulcnsis Green. 72 D. J. WILLIAMS Berkshire : Silwood Park, Holcus mollis, 31^.1951 (K. L. Boratynski). Durham : Low Fell, vi.i943 (R. S. Bagnall). Kent: Thurnham, Trisetumflavescens, I3.vii. 1921 (E. E. Green). Isle of Wight : Seaview, 3.ix.i92i (E. E. Green). Norfolk: Snettisham, i8.vii.i895 (R. Newstead). Northumberland: Alnmouth, 2.111.1935 (R. S. Bagnall). Surrey : Camberley, 5.ix.i923, vii.1929, 23.vii.i932 (E. E. Green). Yorkshire: Askham Bog, Agrostis tennis, 22. vi. 1956 (D. J. Williams). WALES. Brecknockshire : Llangammarch, vi.i926 (E. Earle). RECOGNITION CHARACTERS. Body elongate elliptical to elongate oval, attaining a length of 4 mm. Antennae 7- or 8-segmented, length about 380 microns. Labium 80-95 microns long. Legs normal, posterior coxae with a few translucent pores ; trochanter + femur 265-285 microns, tibia + tarsus 285-320 microns. Circulus small and round. Ostioles with about 6 trilocular pores on each lip and without setae. Anal ring with 6 setae twice as long as diameter of ring. Cerarii present on last 2 abdominal segments. Anal lobe cerarii each with a pair of conical setae, a small cluster of 7 or 8 trilocular pores, not on a sclerotized plate but small area between the setae sclerotized. Accompanied also by a single auxiliary seta immediately above cerarian setae. Cerarii on segment VIII with 2 smaller conical setae and about 6 or 7 trilocular pores and no auxiliary setae. Dorsal surface of body with short slender setae. Multilocular disc pores absent. Trilocular pores not numerous, evenly distributed. Tubular ducts with oral collar of one size ; absent on segments IX -f X but present on all anterior abdominal segments and thorax in transverse bands and tending to become scattered on head. In some specimens they are quite sparse on thorax and head. Ventral surface of body with a stout pair of apical setae longer than anal ring setae. Other ventral setae slender but mainly longer than on dorsum ; not numerous. Multilocular disc pores present on segments IX + X and in transverse rows at posterior edges of segments V-VIII in median areas. Present also at anterior edges of segments VI-VIII and occasionally in median areas of anterior abdominal segments, thorax and head. Tubular ducts of 2 sizes, a larger type, similar to dorsal ducts, numerous in groups around margins to head and also in transverse rows on abdominal segments. Some also present in median areas of thorax. A smaller type of duct less numerous, situated in median areas of abdominal segments and sometimes among the lateral groups of the larger ducts. NOTES. This species is, apparently rather common in Britain, and has been misi- dentified in the British literature as T. pulvemrius (Newstead) . The illustration has been prepared from specimens collected at Askham Bog, Yorkshire, which agree well with the type. Some other specimens studied show fewer multilocular disc pores and tubular ducts but these represent an extreme in variation. Trionymus tomlini Green (Text-fig. 29) Pseudococcus (Trionymus) californicus Ehrhorn, Green, 1925 : 522. (Misidentification.) Pseudococcus (Trionymus) tomlini Green, 1925 : 525. HABIT AND DISTRIBUTION. External appearance not known. Found beneath the leaf sheaths of grasses. CHANNEL ISLANDS. Guernsey : Port Grat, Psamma arenaria (=Ammophila arenaria), ix. 1925 (J. R. le B. Tomlin) (Type) ; Vazon Bay, Agropyron repens, ix.i<)24. ENGLAND. Isle of Man : Dalby in sandy shingle above high water mark ix.igz2 (L. E. Tomlin). RECOGNITION CHARACTERS. An elongate oval species measuring about 3-5 mm. long. Anal lobes moderately developed. Antennae 8-segmented, 425 microns long. Legs rather long, THE BRITISH PSEU DOCOCCI D AE \ LL 73 b o FIG. 29. Trionymns tomlini Green. 74 D. J. WILLIAMS posterior coxae with a few translucent pores. Trochanter + femur 285-340 microns, tibia 4- tarsus 355-370 microns. Labium about 95 microns long. Anterior and posterior ostioles present, each lip with 6-8 trilocular pores, usually without setae but occasionally present. Circulus large and oval with a distinct intersegmental fold. Anal ring with 6 setae about twice length of its diameter. Cerarii numbering 2 pairs. Anal lobe cerarii each with 2 conical setae on an oval sclerotized plate nearly as large as anal ring and containing about 35-42 trilocular pores and 8 or 9 auxiliary setae. Penultimate cerarii not on a sclerotized area, each with 2 smaller conical setae, about 15 trilocular pores and 2 or 3 auxiliary setae. Dorsal surface with slender setae of various sizes. Multilocular disc pores absent on segments IX + X and present at anterior and posterior edges of the other abdominal segments in no definite pattern ; not numerous and becoming sparse on anterior abdominal segments ; a few also present on thorax. Trilocular pores evenly distributed. Tubular ducts with oral collar of 2 sizes. A smaller type, not numerous, in middle of abdominal segments except IX + X and also present on thorax. A larger type of duct more numerous, arranged on segments II-VIII mainly in transverse rows on posterior edges and in marginal groups, but a few also present towards anterior edge of each segment. On the meta- and mesothorax they become scattered and on the prothorax and head form definite groups. Ventral surface with apical setae longer than anal ring setae ; each anal lobe also with a small sclerotized patch which is not attached to the apical seta. Body setae rather numerous, all slender, of various sizes but mainly long. Multilocular disc pores numerous on abdomen, present on segments IX -f- X and in transverse rows at posterior edges of segments IV-VIII. Situated also on anterior edges of segments VI- VI 1 1 and a few present on anterior abdominal segments and in median areas of thorax and head. Tubular ducts of same two types as on dorsum. A smaller type on abdomen, mainly across the middle of each segment. A larger type present in transverse rows at posterior edges of abdominal segments and in marginal groups which extend to head. Groups also present in median areas of thorax and head. NOTES. In its general distribution of pores and ducts, this species comes very close to T. perrisii but differs in the form of the circulus which is quite large and divided by an intersegmental fold, whereas the circulus of T. perrisii is small and oval. It seems to have close affinities with T. modocencis (Ferris) and T, haancheni McKenzie, described from the U.S.A. which also have 2 pairs of cerarii and a large divided circulus. In this respect T. tomlini comes closest to T. haancheni but possesses more numerous multilocular disc pores on the dorsum, and on the venter they extend to the thorax and head whilst in T. haancheni they are present on the abdomen only. REFERENCES BALACHOWSKY, A. S. 1934. Contribution a 1'etude des Coccides de France ( i ye note) . Recherches complementaires sur la faune de Corse. Bull. Soc. ent. Fr. 39 : 67-72. 1948. Les Cochenilles de France, d'Europe, du nord de 1'Afrique, et du Bassin Mediter- raneen. IV. Monographic des Coccoidea ; Classification Diaspidinae (Premiere Partie). Actualit^s sci. industr. 1054 : 243-394. *954 [ X 953]- Sur un Pseudococcini (Horn. Coccoidea) nouveau du Cap Bon (Tunisie). II. Presence de Rhizaspidiotus bivalvatus Goux (Coccoidea, Diaspidinae) en Afrique du Nord. Bull. Soc. not. Tunis. 6 : 227-253. BERG, C. 1899. Substitution de nombres genericos. III. Comun. Mus. nac. B. Aires, 1 : 77-80. BORCHSENIUS, N. S. 1948. Toward a revision of the genus Phenacoccus Ckll. (Insecta, Homop- tera, Coccoidea). C.R. Acad. Sci. U.R.S.S. 61 : 953-956. 1949. Fauna U.S.S.R. Pseudococcidae. Zool. Inst. Acad. Sci. (N.S. 38) 7, 383 pp. BORCHSENIUS, N. S. & TER-GREGORIAN, M. A. 1956. Coccoidea injurious to wheat and other plants in Armenia. Izv. Akad. Naiik Arm. S.S.R., Erevan, 9 : 17-19. THE BRITISH PSEUDOCOCCI D AE 75 BRAIN, C. K. 1912. Contribution to the knowledge of mealy bugs, genus Pseudococcus, in the vicinity of Cape Town, South Africa. Ann. ent. Soc. Amer. 5 : 177-189. COCKERELL, T. D. A. 1893. Notes on the genus Pseudococcus Westwood. Ent. News, 4 : 317, 318. 1900. Some Coccidae quarantined at San Francisco. Psyche, 9 : 70-72. DANZIG, E. M. 1960. Some new and little known mealybugs (Homoptera, Coccoidea, Pseudo- coccidae) of the Leningrad Region. Rev. Ent. U.R.S.S. 39 : 172-181. DE LOTTO, G. 1958. The Pseudococcidae (Horn. : Coccoidea) described by C. K. Brain from South Africa. Bull. Brit. Mus. (nat. Hist.) Ent. 7 : 77-120. DONISTHORPE, H. ST. J. K. 1907. Myrmecophilous notes for 1906. Ent. Rec. 19 : 4-7. DOUGLAS, J. W. 1888. Notes on some British and exotic Coccidae (No. 10). Ent. mon. Mag. 25 : 86-89. 18880. Notes on some British and exotic Coccidae (No. n). Ibid. 25 : 124, 125. 1889. Notes on some British and exotic Coccidae (No. 14). Ibid. 25 : 314-317. 1890. Notes on some British and exotic Coccidae (No. 16). Ibid. 26 : 153-155. ESSIG, E. O. 1942. College Entomology, New York. pp. vii -f- 900. EZZATT, Y. M. & McCoNNELL, H. S. I95&. The Mealybug Tribe Planococcini (Pseudococcidae, Homoptera). Bull. Md. agric. Exp. Sta. A-84. FERNALD, M. E. 1903. A Catalogue of the Coccidae of the World. 360 pp. FERRIS, G. F. 1918. The California species of mealybugs. Stanf. Univ. Publ. biol. Set. 78 pp. 1950, 1953. Atlas of the Scale Insects of North America, 5, 6. Goux, L. 1934. Notes sur les Coccides (Hem.) de la France. (96 note). Contribution a l'6tude du genre Heliococcus avec description de deux especes nouvelles. Bull. Soc. ent. Fr. 39 : 164-171. 1941. Contribution a l'6tude d'un faisceau d'especes constituent un sous-genre nouveau du genre Pseudococcus (Hem. -Coccidae). Bull. Mus. Hist. nat. Marseille, 1 : 66-83. 19410. Description d'un Rhizoecus nouveau et de sa larve n6onate (!). Ibid. 1 : 197- 203. 1942. Notes sur les Coccides (Hem. Coccoidea) de la France. (3 2 me note). Description d'un Phenacoccus et d'un Rhizoecus nouveaux. Ibid. 2 : 33-45. GREEN, E. E. 1915. Observations on British Coccidae in 1914, with descriptions of new species. Ent. mon. Mag. 51 : 175-185. 1916. On two new British Coccidae, with notes on some other British species. Ibid. 52 : 23-31- 1917. Observations on British Coccidae ; with descriptions of new species. Ibid. 53 : 201-210, 260-264, 265-269. 1920. Observations on British Coccidae. No. V. Ibid. 56 : 114-130. 1921. Observations on British Coccidae, with descriptions of new species. No. VI. Ibid. 57 : 146-152, 189-200. 1923. Observations on British Coccidae. VIII. Ibid. 59 : 211-218. 1924. On some new species of Coccidae from various sources. Bull. ent. Res. 15 : 41-48. 1925. Notes on the Coccidae of Guernsey (Channel Islands) with descriptions of some new species. Ann. Mag. nat. Hist. (9) 16 : 516-527. 19250. Observations on British Coccidae. IX. Ent. mon. Mag. 61 : 34-44. 1926. Observations on British Coccidae. X. Ibid. 62 : 172-183. 1928. Observations on British Coccidae. XI. With descriptions of new species. Ibid. 64 : 20-31. 1930. Observations on British Coccidae. XII. Ibid. 66 : 9-17. 1931. Observations on British Coccidae. XIII. Ibid. 67 : 99-106. 1931*. Notes on some Coccidae from Iceland. Ent. Tidskr. 52 : 263-269. 1934. Observations on British Coccidae. XIV. Ent. mon. Mag. 70 : 108-114. HAMBLETON, E. J. 1946. Studies of hypogeic mealybugs. Rev. Ent., Rio de J. 17 : 1-77. 19460. A new name for a mealybug. Proc. biol. Soc. Wash. 59 : 177. HARDY, J. 1868. Notes for 1864. Hist. Berwicksh. Nat. Cl. 5 : 136, 137. 76 D. J. WILLIAMS KIRITCHENKO, A. N. 1 93 1. Second contribution to the Coccid fauna of Ukraine and the Crimea. PI. Prot. Leningr. 7 : 307-321. KUNCKEL D'HERCULAIS, J. 1878. Histoire de la cochenille vivant sur les racines des palmiers de la section des Seaforthia. Expos6 des caracteres du genre Rhizoecus. Ann. Soc. ent. Fr. (5) 8 : 161-164. LEONARDI, G. 1918. Terza contribuzione alia conoscenza delle Cocciniglie Italiane. Boll. Lab. Zool. Portici, 12 : 188-216. LINDINGER, L. 1912. Die Schildlause (Coccidae} Enropas, Nordafrikas, und V order asiens, einschliesslich der Azoren, der Kanaren und Madeiras. Stuttgart. 388 pp. 1934. Die Schildlaus-Arten P. Fr. Bouches und ihre Deutung. Ent. Jb. 43 : 162. LINNAEUS, C. 1766. Insecta Hemiptera. Coccus. Sy sterna Nat (Ed. 12) 1 : 739-743. McKENZiE, H. L. 1960. Taxonomic Study of California Mealybugs with descriptions of new species. (Homoptera : Coccoidea : Pseudococcidae.) Hilgardia, 29 : 681-770. MARCHAL, P. 1908. Notes sur les Cochenilles de 1'Europe et du nord de 1'Afrique. Ann. Soc. ent. Fr. 77 : 223-309. MASKELL, W. M. 1893. Further Coccid notes, with descriptions of new species from Australia, India, Sandwich Islands, Demarara, and South Pacific. Trans. N.Z. Inst. (1892) 25 : 201- 252. MORRISON, H. 1945. The mealybug genus Heterococcus Ferris and some of its relatives. /. Wash. Acad. Sci. 35 : 38-55. NEWSTEAD, R. 1891 . On some new or little known Coccidae found in England. Ent. mon. Mag. 27 : 164-166. 1892. On new or little known Coccidae, chiefly English (No. 2). Ibid. 28 : 141-147. - 1893. New or little known Coccidae, chiefly English (No. 3). Ibid. 29 : 77-79. 1895. Observations on Coccidae (No. n). Ibid. 31 : 165-167. 1895^. Observations on Coccidae (No. 12). Ibid. 31 : 213, 214. i895&. Observations on Coccidae (No. 13). Ibid. 31 : 233-236. 1897. Observations on Coccidae (No. 16). Ibid. 33 : 165-171. 1898. Observations on Coccidae (No. 17). Ibid. 34 : 92-99. 1901. Observations on Coccidae (No. 19). Ibid. 37 : 81-86. 1903. Monograph of the Coccidae of the British Isles, Ray Society, 2 : 162-195. RAU, G. J. 1937. Two apparently undescribed mealybugs (Hemiptera Pseudococcidae) from New York State. Bull. Brooklyn ent. Soc. 32 : 195-201. REYNE, A. 1951. A re-description of Ripersia corynephori Sign. Tijdschr. Ent. 94 : 189-206. 1953. Ripersia wunni n. sp. (Pseudococcidae). Ent. Ber., Amst. 14 : 235-239. 1958. Phenacoccus sphagni (Green) in Holland. Ibid. 18 : 20-26. Risso, A. 1813. M6moire. Sur 1'Histoire Naturelle des oranges, bigaradiers, limettiers, c6dratiers, limoniers ou citroniers, cultives dans le department des Alpes maritimes. Ann. Mus. Hist. not. Paris, 30 : 416-418. SIGNORET, V. 1875. Essai sur les Cochenilles ou Gallinsectes. Ann. Soc. ent. Fr. (5) 5 : 15-40, 305-352, 353-394- SIRAIWA, H. 1935. Studies on mealybugs infesting pear in Japan. Kontyu, 9^: 63-75. SUL, K. 1912. Heliococcus bohemicus n. gn., n. sp. Acta. Soc. ent. Bohem. (Csl.) 9 : 39-48. 1945- Zevni morphologie, metamorfosa a beh zivota cervce Nipaecoccits n. gn. nipae Maskell. Acta Soc. Sci. nat. Morav. 17 : 1-48. TAKAHASHI, R. 1957. Key to the genera of Pseudococcidae in Japan, with descriptions of three new genera and two new species. Bull. Univ. Osaka Pref. B, 7 : 1-8. TARGIONI TOZZETTI, A. 1867. Studii sulle Cocciniglie. Mem. Soc. ital. Sci. nat. N. 3, 3 : 1-87. WESTWOOD, J. O. 1840. An introduction to the modern classification of insects, founded on the natural habits and corresponding organization of different families. Synopsis of the British Insects. 2 : 158 pp. WILLIAMS, D. J. 1960. A new species of Dysmicoccus Ferris (Pseudococcidae : Homoptera) on banana. Bull. ent. Res. 51 : 239-241. THE BRITISH PSE UDOCOCCI D AE 77 WILLIAMS, D. J. 1961. Notes on the genus Heterococcus Ferris (Coccoidea, Homoptera) with a description of a new species injurious to guineacorn (Sorghum vulgare) in Nigeria. Ibid. 51 : 671-675. ZAHRADNin, J. 1959- KUc Zvifeny C.S.R. Cervci-Coccinea, Praha, 3 : 527-552. ZIMMERMAN, E. C. 1948. Insects of Hawaii, Honolulu, 5 : 132-436. INDEX aceris Phenacoccus, 34 aceris Pseudococcus, 34 adonidum Coccus, 40 adonidum Pseudococcus, 40 alazon Dysmicoccus, 39 albidus Pararhizoecus, 41 albidus Rhizoecus, 41 ANTONINA, 7 crawi, 8 socialis, 8 ATROCOCCUS, 8 cracens, 9 luffi, ii paludinus, 1 1 BALANOCOCCUS, 13 boratynskii, 15 scirpi, 17 balteatus Peliococcus, 32 balteatus Phenacoccus, 32 boratynskii Balanococcus, 15 brevipes Dysmicoccus, 4 cactearum Spilococcus, 52 cacticans Rhizoecus, 43 cacticans Ripersiella, 43 californicus Pseudococcus, 72 californicus Trionymus, 72 calluneti Parapedronia, 56 calluneti Pseudococcus, 56 calluneti Spinococcus, 56 CHNAUROCOCCUS, 17 subterraneus, 17 CHORIZOCOCCUS, 19 lounsburyi, 19 peregrinus, 21 citri Dactylopius, 40 citri Dorthesia, 39 citri Planococcus, 39 citri Pseudococcus, 39 Coccidella dianthi, 43 elongata, 45 mesembryanthemi, 45 Coccus adonidum, 40 halophilus, 3, 47 comstocki Pseudococcus, 39 cracens Atrococcus, 9 crawi Antonina, 8 cuspidatae Dysmicoccus, 23 cuspidatae Pseudococcus, 23 dactylis Pseudococcus, 59 dactylis Trionymus, 59 Dactylopius citri, 40 hibernicus, 63, 69 longispinus, 40 luffi, ii nipae, 31 pulverarius, 63 radicum, 47, 69 theobromae, 4 walkeri, 21 decoratus Rhizoecus, 47 dianthi Coccidella, 43 dianthi Morrisonella, 43 dianthi Rhizoecus, 43 diminutus Pseudococcus, 61 diminutus Trionymus, 61 donisthorpei Ripersia, 69 Dorthesia citri, 39 DYSMICOCCUS, 21 alazon, 39 brevipes, 4 cuspidatae, 23 piricola, 23 walkeri, 21 wistariae, 23 elongata Coccidella, 45 elongata Morrisonella, 45 clongatus Rhizoecus, 45 elongatus Rhizoecus, 43 EURIPERSIA, 24 europaea, 4, 24 tomlinii, 26 europaea Euripersia, 4, 24 europaea Ripersia, 17, 24 e#/ Ripersia, 26 falcifer Rhizoecus, 47 Ferrisiana virgata, 4 filicicola Ripersia, 54 filicicola Spilococcus, 54 formicarii Ripersia, 17 fragilis Pseudococcus, 40 gahani Pseudococcus, 40 halophila Ripersia, 41, 47 halophilus Coccus, 3, 47 halophilus Rhizoecus, 47, 49 D. J. WILLIAMS HELIOCOCCUS, 28 minutus, 29 HETEROCOCCUS, 29 nudus, 31 pulverarius, 31 hibernicus Dactylopius, 63, 69 hibernicus Pseudococcus, 63 hibernicus Trionymus, 63 interruptus Phenacoccus, 35 latipes Pseudococcus, 40 longispinus Dactylopius, 40 longispinus Pseudococcus, 40 lounsburyi Chorizococcus, 19 lounsburyi Pseudococcus, 19, 21 lounsburyi Trionymus, 19, 21 luffi Atrococcus, 1 1 luffi Dactylopius, n /$ Pseudococcus, 1 1 malacearum Pseudococcus, 40 mamillariae Pseudococcus, 52 maritimus Pseudococcus, 40 mesembryanthemi Coccidella, 45 mesembryanthemi Morrisonella, 45 mesembryanthemi Rhizoecus, 45 mesnili Ripersia, 26 minutus Heliococcus, 29 minutus Phenacoccus, 29 Morrisonella dianthi, 43 dongata, 45 mesembryanthemi, 45 newsteadi Pseudococcus, 61 newsteadi Trionymus, 61 nipae Dactylopius, 31 nipae Nipaecoccus, 31 nipae Pseudococcus, 31 NIPAECOCCUS, 31 nipae, 31 nudus Heterococcus, 31 nudus Phenacoccus, 31 orestes Trionymus, 63 paludinus Atrococcus, 1 1 paludinus Pseudococcus, 9, n Parapedronia calluneti, 56 Pararhizoecus albidus, 41 PELIOCOCCUS, 31 balteatus, 32 penium Saccharicoccus, 50 peregrinus Chorizococcus, 21 peregrinus Pseudococcus, 19 peregrinus Trionymus, 19 perrisii Trionymus, 63 perrisii Westwoodia, 63 phalaridis Pseudococcus, 67 phalaridis Trionymus, 67 PHENACOCCUS, 32 aceris, 34 balteatus, 32 interruptus, 35 minutus, 29 nudus, 31 sphagni, 37 piricola Dysmicoccus, 23 piricola Pseudococcus, 23 PLANOCOCCUS, 39 citri, 39 PSEUDOCOCCUS, 39 aceris, 34 adonidum, 40 calif ornicus, 72 calluneti, 56 citri, 39 comstocki, 39 cuspidatae, 23 dactylis, 59 diminutus, 61 fragilis, 40 gahani, 40 hibernicus, 63 latipes, 40 longispinus, 40 lounsburyi, 19, 21 malacearum, 40 mamillariae, 52 maritimus, 40 newsteadi, 61 nipae, 31 paludinus, 9, n peregrinus, 19 phalaridis, 67 piricola, 23 pulverarius, 63 quercus, 34 socitts, 34 sphagni, 37 tomlini, 72 ulicis, 34 w/wj, 34 walkeri, 21, 23 wistariae, 23 pulveraria Ripersia, 31 pulverarius Dactylopius, 63 pulverarius Heterococcus, 31 pulverarius Pseudococcus, 63 pulverarius Trionymus, 63, 69 quercus Pseudococcus, 34 radicum Dactylopius, 47, 69 radicum Trionymus, 69 THE BRITISH PSEU DOCOCCID AE 79 RHIZOECUS, 41 albidus, 41 cacticans, 43 decoratus, 47 dianthi, 43 elongatus, 45 elongatus, 43 falcifer, 47 halophilus, 47, 49 mesembryanthemi, 45 terrestris, 47 Riper sia donisthorpei, 69 europaea, 17, 24 exul, 26 filicicola, 54 formicarii, 17 halophila, 41, 47 mesnili, 26 pulveraria, 31 scirpi, 17 subterranea, 17 terrestris, 47 tomlinii, 17, 24, 26 wiinni, 24 Ripersiella cacticans, 43 SACCHARICOCCUS, 50 penium, 50 scirpi Balanococcus, 17 sctr* Riper sia, 17 socialis Antonina, 8 socius Pseudococcus, 34 sphagni Phenacoccus, 37 sphagni Pseudococcus, 37 SPILOCOCCUS, 52 cactearum, 52 filicicola, 54 SPINOCOCCUS, 56 calluneti, 56 subterranea Ripersia, 17 subterraneus Chnaurococcus, 17 terrestris Rhizoecus, 47 terrestris Ripersia, 47 theobromae Dactylopius, 4 thulensis Trionymus, 69 tomlini Pseudococcus, 72 tomlini Trionymus, 72 tomlinii Euripersia, 26 tomlinii Ripersia, 17, 24, 26 TRIONYMUS, 58 californicus, 72 dactylis, 59 diminutus, 61 hibernicus, 63 lounsburyi, 19, 21 newsteadi, 61 orestes, 63 peregrinus, 19 perrisii, 63 phalaridis, 67 pulverarius, 63, 69 radicum, 69 thulensis, 69 tomlini, 72 Pseudococcus, 34 Pseudococcus, 34 virgata Ferrisiana, 4 walkeri Dactylopius, 21 walkeri Dysmicoccus, 21 walkeri Pseudococcus, 21, 23 Westwoodia perrisii, 63 wistariae Dysmicoccus, 23 wistariae Pseudococcus, 23 wiinni Ripersia, 24 PRINTED IN GREAT BRITAIN BY ADLARD AND SON, LIMITED BARTHOLOMEW PRESS, DORKING NEW AFRICAN CADDIS-FLIES (Order TRICHOPTERA) D. E. KIMMINS BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) ENTOMOLOGY Vol. 12 No. 2 LONDON: 1962 NEW AFRICAN CADDIS-FLIES (Order TRICHOPTERA) BY D. E. KIMMINS British Museum (Natural History ' story)^ Pp. 81-121 ; 107 Text-figures BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) ENTOMOLOGY Vol. 12 No. 2 LONDON : 1962 THE BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY), instituted in 1949, is issued in five series corresponding to the Departments of the Museum, and an Historical Series. Parts will appear at irregular intervals as they become ready. Volumes will contain about three or four hundred pages, and will not necessarily be completed within one calendar year. This paper is Vol. 12, No. 2 of the Entomological series. The abbreviated titles of periodicals cited follow those of the World List of Scientific Periodicals. Trustees of the British Museum, 1962 PRINTED BY ORDER OF THE TRUSTEES OF THE BRITISH MUSEUM Issued 17 April, 1962 Price Fifteen Shillings NEW AFRICAN CADDIS-FLIES (Order TRICHOPTERA) By D. E. KIMMINS SYNOPSIS This paper deals mainly with species of the subfamilies Oestropsinae and Leptocerinae and includes a lectotype designation and redescription of the male genitalia of Phanostoma senegalense Brauer and a redescription and figures of the female holotype of Setodellina albopunctata Lestage. The synonymy of the genus Phanostoma Brauer with the genus Amphipsyche McLachlan is confirmed and four new species of the latter genus are described. The genus Chloropsyche McLachlan is placed as a synonym of A ethaloptera Brauer. A revised key to the African genera of the Leptocerinae is given and the genus Setodellina is synonymized with Oecetis. THIS paper is based upon material sent for identification by Dr. Marjorie Scott (South Africa), Dr. Philip S. Corbet (Uganda) and on British Museum (Nat. Hist.) accessions. The author wishes to express his thanks to Drs. Scott and Corbet for their generosity in presenting to the British Museum (Nat. Hist.) the types of the new species based upon their material, in addition to other duplicate material. Paratypes of South African material (where available) have been returned to Dr. Marjorie Scott, and will in due course be deposited in the South African Museum. The South African material was collected by the following workers : Messrs. John Agnew, Brian Allanson, Mark Chutter, Dr. A. D. Harrison and Mr. W. D. Olliff, in addition to Dr. Scott herself, but the individual collectors' names are not given on the locality labels. For the loan of the type series of Phanostoma senegalense Brauer the author is indebted to Dr. M. Beier, Naturhistorisches Museum, Vienna, and for the loan of the type of Setodellina albopunctata Lestage to Dr. P. Basilewsky, Musee Roy ale de 1'Afrique centrale, Tervuren, Belgium. Family PSYCHOMYIIDAE Paduniella ankya Mosely Two males, one from Volksrust and the other from the Natal National Park, are referred to this species. The genitalia do not entirely agree with the original descrip- tion and figures, but I do not consider the differences to be specific. The shape of the clasper of the Natal specimen is intermediate between that of the type specimen and that of an example from the Semliki Forest. The locality of the type (Namwamba Valley) and the Semliki Forest are both in the Ruwenzori region. ENTOM. 12, 2. 6 84 D. E. KIMMINS Family HYDROPSYCHIDAE Subfamily OESTROPSINAE THE GENERA AMPHIPSYCHE McLACHLAN AND PHANOSTOMA BRAUER These two genera were originally separated on the difference in the tibial spur formula (Amphipsyche 1.4.4, Phanostoma 2.4.2) and on the presence of a weak " false discoidal cell " in Phanostoma. As additional species of Amphipsyche were FIGS. 1-3. Paduniella ankya Mosely, , 1.4.4, I -4-3. 1-4-2, 0.4.3, 0.4.2. Mid-tibia and first three basal tarsal segments moderately flattened in , strongly so in $. Maxillary palpi weak, rather short. Aedeagus with or without parameres. (A. proluta and A. sene- galensis are certainly without spine-like parameres, nor does Martynov's figure of A. distinda give any indication of them. The four new African species have such parameres, as do A. indica Mart, and A. bengalensis Mart.) KEY TO AFRICAN SPECIES OF Amphipsyche (MALES) 1 Stem of 7? 2+3 in fore wing closely approximated to R t ; aedeagus without spiniform parameres ......... senegalensis (Brauer) Stem of R^+3 in f re wing widely separated from R t ; aedeagus with two spiniform parameres ............. 2 2 Lobes of tenth segment, in dorsal view, arising from broad, shouldered bases . . 3 Lobes of tenth segment, in dorsal view, not arising from broad bases ... 4 3 Lobes of tenth segment parallel in dorsal view, deep in side view . . corbeti sp. n. Lobes of tenth segment divergent in dorsal view, narrow in side view . berneri sp. n. 4 Apex of aedeagus, in side view, strongly clavate, parameres angled abruptly upwards. Lobes of tenth segment deep in side view ..... ulmeri sp. n. Apex of aedeagus, in side view, produced but not strongly clavate, parameres gently curved. Lobes of tenth segment narrow in side view . . . scottae sp. n. Amphipsyche senegalensis (Brauer) (Text-figs. 4-13) Phanostoma senegalense Brauer, 1875 : 71, pi. 4, figs. 5-50 (Senegal) ; Ulmer, 1907 : 26, fig. 12 (Congo) ; id., igoja : 32-33, fig. 24 ; id., 19076 : 159, pi. 21, fig. 198 ; Mosely, 1932 : 5, pi. i, fig. 6 (Mozambique) ; Barnard, 1934 : 3^9- Brauer's description is based upon males only and the account of the general appearance is good. His figure of the wing venation is also reasonably good, but he shows the veins R 2+3 and R in the fore wing as fused near their bases, whereas (as Ulmer has pointed out) they are separate but close together. Cell R 2+s in hind wing may be either just sessile or with a short footstalk. His description and figures of the male genitalia, being made from the dried material, are rather inadequate by modern standards and I am therefore giving a new description and figures. ENTOM. 12, 2. 6 86 D. E. KIMM1NS DESIGNATION OF LECTOTYPK No lectotype has been selected from Brauer's type series, so I take this opportunity of designating the example with the following labels : " Steindachner, 1869, Senegal "; " senegalense det. Brauer "; " senegalense det. Ulmer "; " Phanostoma senegalense Brauer, $, LECTOTYPE, D. E. Kimmins det. 1960 " (Vienna Museum). The lectotype has one pair of wings mounted between sheets of celluloid, the abdomen and one fore leg cleared in KOH solution and preserved in a small vial of glycerine, both prepara- FIGS. 4-9. Amphipsyche senegalensis (Brauer), c? Lectotype. 4, wings ; 5, fore tibia, with apex more enlarged ; 6, genitalia, lateral ; 7, aedeagus, lateral ; 8, genitalia, dorsal ; 9, ventral and from behind. NEW AFRICAN CADDIS-FLIES 87 tions being attached to the staging pin. There are also four other males from the type-series. c? GENITAHA of lectotype. Ninth segment with the dorsal apical margin only slightly produced at its centre. Side-pieces large and rounded. Tenth segment deeply excised at its centre to form 11 FIGS. 10-13. Amphipsyche senegalensis (Brauer), ? (Lualaba River). 10, wings ; n, genitalia, lateral ; 12, ventral ; 13, bursa copulatrix, ventral, more enlarged. a pair of narrow ovate lobes, set well below the level of the ninth tergite and linked to the latter by membrane. The upper surface of the lobes bears a number of small setae. Lower margins of the tenth segment partly enfold the stem of the aedeagus. The latter organ has a wide base, constricting to a slender stem and then dilating to form a clavate apex. The apical surface of aedeagus bears two small triangular teeth or lobes (shown in Brauer 's fig. 50). There are no 88 D. E. KIMMINS spiniforni parameres. Claspers long, slender and sinuous, the articulation between the basal and terminal segments somewhat indefinite. $ GENITALIA (Congo, Lualaba River). Pleurosternum of eighth segment large, plate-like, its convex lower margin almost meeting that of the opposite side ventrally. Posterior margin slightly excised. Eighth sternite reduced to a narrow, lightly sclerotixed tongue, not extending FIGS. 14-18. Amphipsychc ulmeri sp. n. J. 14, wings; 15, genitalia, lateral; 16, dorsal ; 17, apex of aedeagus, dorsal ; 18, genitalia, ventral and behind. as far as apices of the pleurosterna. Ninth tergite forming a hood, clasper groove obscure. Ninth sternite narrow, apex slightly excised. Tenth segment with the usual three pairs of processes. Length of fore wing, cJ, 13-15 mm.; ?, 9-10 mm. I have seen no females from the type-locality, Senegal. I have therefore en- deavoured to fix the female of senegalensis by examination of females taken at the same time and place as males of senegalensis. Examination of females fulfilling these conditions from the Congo (Lualaba R.) and Lake Nyasa suggests that the female NEW AFRICAN CADDIS-FLIES 89 venation differs appreciably from that of the male. In the fore wing, veins R 2+3 and RI are not closely approximated and Rs is more or less strongly sinuous, much more so than in the male. Examples from Lake Victoria also show this sinuosity of Rs in the fore wing, and in this locality the males would appear to be extremely rare, since I have seen only one example, although Dr. Corbet and Dr. Hickin have sent me several hundred females. The fact that females with a sinuous Rs in the fore wing appear to be associated with male senegalensis suggests that Phanostoma curvinerve Navas, based upon females from Egypt, may be a synonym of senegalensis. This sinuosity of Rs in the fore wing does not appear to be a constant generic character in Amphipsyche since, in the females of A. scottae sp. n. from S. Africa, Rs is almost straight. DISTRIBUTION. I have seen males from SENEGAL, CONGO, S. RHODESIA, NYASA- LAND and UGANDA. Amphipsyche ulrneri sp. n. (Text-figs. 14-18) Phanostoma senegalense Brauer ; Ulmer, 1923 : 19 (partim, Sennar) ; id., 1924 : 2 (Sennar). EGYPTIAN SUDAN : Sennar, 18-27.11.1914, Ebner, 7 $, two labelled " Phanostoma senegalense Brau." in Ulmer 's writing. c? HOLOTYPE (pinned). General colour pale tawny, antenna finely annulated with reddish. Thorax clothed with short, pale pubescence. Fore wing very pale tawny, with slightly darker clouding over the anastomosis. Rs almost straight, Rz+ 3 separated from R t at their bases by about the distance between 7? 4 and R & . In the hind wing, cell J? 2 +s is sessile. cj GENITALIA following the general pattern of the genus. Aedeagus with two curved spine-like parameres, angled abruptly upwards. Stem of aedeagus less slender than in senegalensis, apex clavate, its lower margin projecting in two rounded, triangular lobes. Length of fore wing, 13-14 mm. c HOLOTYPE (pinned, with wings between celluloid and abdomen in a small vial of glycerine) and paratypes in the Naturhistorisches Museum, Vienna. In the course of correspondence with Dr. Ulmer in 1956 concerning Phanostoma, he informed me that he had in his collection two females from Sennar and that they had Rs in the fore wing curved but less so than in Egyptian examples which he had identified as P. curvinerve Navas. This fact may be additional evidence in favour of A. ulmeri being distinct from A . curvinervis. Amphipsyche corbeti sp. n. (Text-figs. 19-23) UGANDA : Northern Province, Victoria Nile, Karuma Falls, P. S. Corbet, numerous males. cJ HOLOTYPE (in alcohol). General colour very pale tawny. Antenna finely annulated witli fuscous. Anterior femur with a longitudinal fuscous streak on ventral surface. Mesonotum rather darker tawny. Abdominal segments whitish, faintly marked with very pale purplish transverse bands on the tergites and with a similarly coloured median ventral streak. In fore wing, /? 2+3 widely separated from R 4 basally. go D. E. KIMMINS cJ GENITALIA. Ninth segment with its dorsal apical margin only slightly produced. Side- pieces rounded. Lobes of the tenth segment broad basally, the apical portion about half as wide as the basal, which projects laterally as a shoulder. In dorsal view, the lobes are parallel, with rounded apices. Aedeagus with a stout stem, in side view somewhat constricted about mid-way, lower apical margin produced in a pair of lobes. In ventral view, the inner margins FIGS. 19-23. Amphipsyche corbeti sp. n. < 19, wings ; 20, genitalia, lateral ; dorsal ; 22, apex of aedeagus, dorsal ; 23, genitalia, ventral and behind. 21, of the lobes are parallel, their basal angles hooked. Above these lobes are a pair of stout, spini- form parameres, curving upwards in side view. Claspers slender, indistinctly two-segmented. ? unknown. Length of fore wing, n mm. $ HOLOTYPE (now mounted as microscope preparations), paratypes in 2% formal- dehyde solution, in British Museum (Nat. Hist.). This species differs from A. ulmeri NEW AFRICAN CADDIS-FLIES 91 in the less constricted stem of the aedeagus, whose apex is more produced, and in the stouter parameres. The tenth segment is wider at the base in dorsal view, with definite shoulders. Amphipsyche berneri sp. n. (Text-figs. 24-28) Phanostoma senegalense Brauer : Kimmins, 1957 : J 3 (Gold Coast examples). GOLD COAST : Volta River, Senchi, i.viii.igso, Lewis Berner, 4 <$. . (J HOLOTYPE (in alcohol). General colour pale tawny yellow. Antenna finely annulated with fuscous, basal segment without dorsal flap but with a small, median, longitudinal carina on apical half of dorsal surface, which curves over outwards. Fore wing with golden pubescence and traces of fuscous pubescence (rather denuded). Apical half of stem of M present. Cu ib represented by a weak cross-vein from anastomosis to Cu 2 + A. In hind wing, /? 4 +5 and M 1+2 confluent for a short distance. 3 GENITALIA. Resembling T. wambana Mosely (1939 : 15), but differing in detail. Ninth segment with prominent, triangular side-pieces and below them there is a triangular excision of the lateral margin. Tenth segment comprising a pair of long, slender spines, strongly arched in side view, their apices crossing in the type. Above these spines (which are fused basally) are two long, slender cerci and two short processes. Aedeagus arched basally, with a median dorsal groove, apical part membranous. Clasper stout, about twice as long as wide in side view, its upper margin elevated about mid-way, then excised before the acute apex. Lower margin sinuous in side view, apex obliquely truncate. In ventral view, the clasper tapers gradually from base almost to apex and is then suddenly constricted to a finger, curving inwards from the outer angle. Inner margin of the clasper produced upwards in apical half to form a rounded setose lobe. At the extreme base of the clasper there arises, from the dorsal margin, a strong, sickle- shaped spine, adjacent to the stem of the aedeagus. Just posterior to this spine arises the basal io8 D. E. KIMMINS branch, slender basally, directed obliquely upward and caudad, dilating apically and setose. This branch is very thin and lightly sclerotized and in the course of mounting has twisted spirally and changed its direction. ? ALLOT YPE (in alcohol). General appearance as in male. Antenna without median carina on basal segment. In fore wing there is a weak, incomplete vein representing the basal half of 76 FIGS. 76-81. Triaenodes uncata sp. n. Genitalia. 76, <$, lateral; 77, <3, tenth segment, dorsal ; 78, <$, claspers, ventral ; 80, ?, lateral ; 81, ?, ventral. the stem of M. Cu lb normal. In hind wing, -ft 4+6 and M 1+2 touching or linked with a short cross-vein. ? GENITALIA. Apical margin of eighth sternite straight, setose. Ninth and tenth segments fused, forming a short anal tube, ventral margin of which is produced in a short spatulate lobe. Sides of anal tube convex, with long setae. Lateral gonapophyses large, ovate, outer surfaces convex. Subgenital plate complex ; on each side at the base is a deep, ovate hollow. From beneath, the plate is broad, with rounded lateral margins and a raised median carina at base. NEW AFRICAN CADDIS-FLIES 109 The anterior margin has a wide, Y-shaped excision, outer angles acute. Beyond the excision is another triangular plate, convex and with a deep and narrow apical excision. This plate is directed obliquely upwards between the lateral gonapophyses. Length of fore wing, . Leptocerus calcaratus Barnard, 1941 : 106-07; fig. B (syn. nov.). Barnard distinguished his species calcaratus from harrisoni on the presence of an acute tooth on each side of the ninth segment (loth tergite of Barnard) and slight differences in the shape of the clasper. These differences seem to me to be no more than individual variation, especially as a paratype of harrisoni shows traces of the lateral acute processes on the ninth segment. OECETIS McLachlan 1877 : 329-330 (type-species Leptocerus ochraceus Curtis, 1825). Setodellina Lestage, 1919 : 202, fig. 5. (type-species Seiodellina albopnnctata Lestage, 1919) (syn. nov.). The genus Setodellina was based by Lestage upon a single example, but in neither the generic nor the specific description does he give any indication of the sex of this example, merely remarking that the genitalia are difficult to describe on account of the bad state of the apex of the abdomen. He figures the venation and compares it with Pseudosetodes Ulmer. No comparison is made with Oecetis, with which genus it agrees in most characters other than the absence of fork R 2 in the hind wing, a character which has since been found to be variable in the genus Athripsodes. His figure shows Sc and R l to be completely fused in the fore wing but no comment is no D. E. KIMMINS made on this point ; in the hind wing these veins are shown as separate for most of their length but in his description they are said to be almost fused and scarcely visible. Ulmer (1923 : 15) placed a second species (S. brunnescens) in the genus Setodellina, figuring the venation and the male genitalia. The hind wing of this species also lacks the fork R z , but the wings are broader than in the figure of 5. albopunctata and Ulmer comments that they are otherwise similar to those of Oecetis. The genitalia of S. brunnescens resemble those of Oecetis gradata, both having the cerci more or less fused to the tenth segment, forming a broad plate. Martynov (1936 : 271) placed a number of Asiatic and African species into Setodellina and gave an extended diagnosis of the genus, including genital characters, particularly the fused cerci. As regards venation, he remarks that apical fork R 2 may be present or absent in the hind wing, a fact that lessens its value as a character separating Setodellina from Oecetis. As far as I known, Martynov did not have the opportunity of studying the type of S. albopunctata and the genital characters which he gives for Setodellina are based upon 5. brunnescens Ulmer, upon his own new species and upon various other species of Oecetis, which he had transferred to Setodellina. In my own paper (1956 : 135), I accepted Martynov's interpretation of the genus Setodellina, but as material of further African species has come to hand it has become increasingly difficult to decide when the cerci cease to be fused with the tenth segment to form a broad plate or anal tube, some species being intermediate in this respect between Setodellina and Oecetis, as defined by its type-species, 0. ochracea (Curtis). Both have the inflated, somewhat globular aedeagus with a downwardly-hooked apex. Thus a conception of the genus Setodellina had grown up which was based largely upon species subsequently placed in it and which were not necessarily congeneric with it. I have been able to study the holotype of Setodellina albopunctata Lestage. The specimen as sent to me lacked the preparation of the hind wing (Lestage had removed both left wings for figuring and attached them by their bases to a card with gum ; the hind wing has at some time become detached from the gum and was miss- ing). For greater safety, I have now mounted the left fore wing and the right hind wing (which was somewhat damaged) between two pieces of celluloid. It is clear from these wings that Lestage's figure of the venation is incorrect as far as the sub- costa and radius of both wings are concerned. I can see no definite evidence of fork R z in the remaining hind wing, although there is a slight thickening of the vein at the point where the fork might be expected to occur. A female of albopunctata in the British Museum (Nat. Hist.) from Nigeria, Gadau, has a definite fork R z in the hind wing. I am refiguring the wings of the type (with fore wing reversed) and have attempted an impression of the pigmentation of the fore wing. The pattern is rather more definite than I had expected from Lestage's description and recalls that of examples from Uganda determined by myself as 5. maculipennis (Ulmer). Examina- tion of the abdomen of the type of albopunctata suggested that it was a female, an impression which was confirmed by clearing in KOH solution. Comparison of the wing venation of the female holotype of albopunctata with Ulmer's figure of maculipennis (1922 : 61) reveals one difference which, though not of generic importance, may be considered specific (Text-figs. SIA-C). In the fore NEW AFRICAN CADDIS-FLIES in wing of albopunctata, M forks basad of the r-m cross-vein. M 3+4 simulates a cross- vein from M to Cu la and fuses with the latter vein for a short distance, appearing as a short stalk to the false fork formed by the divergence of M 3 _,_ 4 and Cu la . In Ulmer's figure (and in the Uganda examples now placed as maculipennis) the fork of M is situated beyond the r-m cross-vein and M 3+4 does not fuse with Cu la but is linked to it by a cross-vein. The use of this character to separate Setodellina from 81 A FIGS. SIA-C. Oecetis spp., wings. SIA, O. albopunctata (Lestage), 9 holotype ; B, presumed male of O. albopunctata ; c, O. maculipennis Ulmer, male. D. E. KIMMINS Oecetis is not supported by other characters in the various species examined and it does not seem worth while to maintain any longer the separation of these two genera. Oecetis albopunctata (Lestage) (Text-figs. SIA, B, D, E, H-J) Setodellina albopunctata. Lestage, 1919 : 202-203, fig. 5 (Congo). UGANDA: Albert Nile, Pakwach, 28-29.^.1956, near Laropi, 27-28.^.1956, P. S. Corbet, <$. NIGERIA : Gadau, 11.1933, Buxton & Lewis, i $. S. AFRICA : Pongola River, Pongola Settlements, 17. ix. 1954, i <. ? GENITALIA OF HOLOTYPE. Eighth stcrnite produced at the centre of its apical margin in an acutely cuspidate subgenital plate, which is margined at its base by a narrow band of brownish pigment, which simulates an excision. Ninth tergite rather short and deep, the centre of its FIGS. SID-G. Oecetis spp., female genitalia. SID, O. albopunctata (Lestage), holotype, lateral ; E, the same, ventral ; F, O. macitlipennis Ulmer, lateral ; o, the same, ventral. NEW AFRICAN CADDIS-FLIES 113 apical margin acutely produced in side view. Tenth segment and cerci fused to form an anal tube with upper and lower margins produced. Lateral gonapophyses large, thin, the ventral margin of each turned outwards, slightly hairy, forming a pair of somewhat reniform lobes in ventral view. Amongst examples from various localities, originally determined as maculipennis Ulmer, a short series of males from Albert Nile, Pakwach has the form of M in the fore wing basad of the r-m cross-vein and the pigmentation of the membrane much as in the type of albopunctata. Fork R 2 is present in the hind wing (although I do not attach much importance to this), the examples are smaller than maculipennis and show certain differences in male genitalia. It is proposed to consider them as the probable male of O. albopunctata (Lestage). n 8 s - JI > I2 - Type. UGANDA : Katera. $. Similar to moyambina Bethune-Baker and to cercene Hewitson, but distal edge of fore wing white patch more or less rounded and underside different. Legs light brown with lighter joints ; palps light brown above and below ; frons light brown with white edges ; eyes brown ; antennal shaft black above, checkered minutely white below ; club orange-tipped. Upperside fore wing : black-brown ; cell and basal third of space i brown with sparse blue scales. A broad white postdiscal band with rounded distal edge, just invading the cell proximad. A small triangular patch on the discocellular. The white band is slightly dentate in 2 and 3, but thereafter rounded and even to vein 9. This band stretches from ia-g, as in cercene. Upperside hind wing : dark grey-brown ; immaculate. Underside fore wing : very pale brownish grey with white band as above, but slightly yellowish near the costa markings in apical area faint. Underside hind wing : very pale brownish grey with markings as in the male. Length of fore wing ; 18 mm. Neallotype $. UGANDA: Katera. ix.i949. T. H. E. Jackson. Recorded from : UGANDA : Katera and Budongo. Epitola convexa Roche (PL i, fig. 7, PL 2, fig. 16) cJ Epitola convexa Roche, 1954 : 496, pi. 20, figs, u, 12. Type. UGANDA : Bwamba. $. Very similar to the females of moyambina Baker, cercene Hewitson and intermedia Roche. Legs brown, heavily scaled whitish ; palps light brown above and below ; eyes brown ; frons brown edged whitish ; antennal shaft black above, checkered white below ; club yellow- tipped. Upperside fore wing : black-brown ; basal area of i and cell brown with blue scales, more blue than in intermedia but less than in cercene and moyambina. A triangular black spot on the disco- cellular, longer and more pointed than in the other species and reaching almost to the lower 132 T. H. E. JACKSON angle of the cell. Broad white postdiscal band, double-toothed in space 2, thereafter narrowing in squared steps between 3, 4 and 5, and 6-9, stretching from veins ia-g. Upperside hind wing : dark grey-brown ; immaculate. Underside fore wing : scarcely differs from cercene Hewitson, except for the slightly different distal margin of the white band. Submarginal and marginal lines as in male. Underside hind wing : grey-brown, with markings as in the male. Length of fore wing ; 21 mm. Neallotype $. UGANDA: Unyoro, Budongo Forest, vm.ig^j. T. H. E. Jackson. Recorded from : FR. EQUAT. AFRICA : Etoumbi and Ouesso ; UGANDA : Bwamba, Budongo and Mpigi. Epitola cercenoides Holland <$ Epitola cercenoides Holland, 1890 : 424. Type. GABOON : " Upper waters of the River Ogove." (Carnegie Mus., Pittsburg.) $ Epitola batesi Druce, 1910 : 365, pi. 34, figs. 2, 3. Type. CAMEROONS : Bitje. <$, $ Epitola batesi Druce ; Seitz, 1920 : pi. 64, h. Recorded from : WEST AFRICA to UGANDA. Epitola uniformis Kirby (PI. i, fig. 8, PL 2, fig. 17) (J Epitola uniformis Kirby, 1887 : 445. Type. NIGERIA : Lagos. Epitola uniformis Kirby ; Seitz, 1920 : pi. 64, h. $ Epitola versicolor Kirby, 1887 : 444. (Described as the male.) Epitola leonina Staudinger ; Seitz, 1920 : 355. $. There has been considerable confusion in the past over the females of uni- formis Kirby, leonina Staudinger and zelza Hewitson. The female described by Kirby, loc. cit. and figured in Seitz, 64, h, is the female of zelza Hewitson. Similarly, the female ascribed by Aurivillius in Seitz, p. 355, to leonina Staudinger is the female of uniformis Kirby. The following evidence is considered conclusive. 1. An examination of the underside of leonina Staudinger shows that it belongs to the group containing zelza Hewitson, tumentia H. Druce, badura Kirby and nigro- venata sp. n. All the females of this group are brown with blue discal areas. It seems probable, therefore, that the female of leonina will be similar. Further, in the eastern Congo and extreme west of Uganda (Bwamba) leonina flies with a blue female and in the west a similar female is found in the same areas as the male. 2. If the above is correct then the black and white female must belong to uniformis and it is significant that this female occurs in all localities cited for the male. The only alternative to this is that this black and white female is merely a variety of cercenoides Holland with blue scaling covering the disc of the hind wing, an unlikely hypothesis, since it would leave uniformis, a comparatively common species, without a known female of any sort. On average; also, the females with the blue discal area in hind wing, are smaller than those of cercenoides. NOTES ON THE EPITOLINAE 133 This insect was described by Aurivillius in Seitz, under the name leonina Staudinger, but a fuller description is given below : . Nearest to cercenoides Holland, but with blue discal area in hind wing. Legs dark brown with paler joints ; palps dark brown above and below, also eyes and frons ; antennal shaft black above, checkered below ; club orange-tipped. Upperside fore wing : black-brown ; cell and extreme base of i blue ; a large black triangular spot on the discocellular ; broad white postdiscal band not invading the cell and with evenly curved distal edge, becoming yellowish towards the costa and stretching from veins la to 9. Slight indentations in 2 and 3 but less so than in cercenoides. Upperside hind wing : dark brown ; a blue patch covering the basal two-thirds of the cell, the extreme base of space 3 and the basal third of i. This blue area is variable ; it may extend over the whole cell and beyond or be reduced to some scattered blue scales, but is present in all specimens before me. Underside fore wing : grey-brown ; the postdiscal band strongly yellow from vein i to the costa ; apical markings prominent as in male. Basal grey-brown area distally V-shaped in which it differs from cercenoides. Underside hind wing : grey-brown with prominent lines as in male. Length of fore wing : 16 mm. Neallotype $. FR. EQUAT. AFRICA : Ouesso, Ketta Forest, ix.igsg. T. H. E. Jackson. Recorded from : SIERRA LEONE ; IVORY COAST ; NIGERIA ; GHANA ; GABOON ; FR. EQUAT. AFRICA ; CONGO ; N. ANGOLA. Epitola dorothea Baker (PI. 9, fig. 87, PL 10, fig. 97) o*, $ Epitola dorothea Baker, 1904 : 227. Type. SIERRA LEONE. Recorded from : SIERRA LEONE : Moyamba, Mabangi ; IVORY COAST : Guiglo ; GHANA : KUMASI. Epitola insulana Aurivillius (PI. i, fig. 9, PL 2, fig. 18, PL 9, fig. 88, PL 10, fig. 98) cJ Epitola insulana Aurivillius, 1923 : 1203. Type. FERNADO Po : San Carlos. (Riksmuseum, Stockholm.) $. Legs and palps below pale brown, heavily dusted with grey scales ; palps above darker brown ; frons light brown laterally fringed with white ; eyes dark brown ; antennal shaft dark brown above, below minutely checkered white ; club orange-tipped. Upperside : nearest to cercene Hewitson and cercenoides Holland but differs from both in the bright blue basal area fore wing. Upperside fore wing : black ; broad white postdiscal band from 2-7 broadest in space 2, 8 mm., where it almost reaches the margin, slightly invading space i at the distal end and narrowest, 2 mm., in space 6, proximally this band is straight from vein 7 to the origin of vein 3 and then bent distad, running almost along vein 2 ; whole basal area bright blue ; extending in space i to within 2 mm. of the margin, small triangular black spot, at junction between white and blue areas arising from vein 7. Upperside hind wing : plain dark brown. Underside fore wing : pale brown with white band of upperside showing through, but exten- ding to space i, proximal edge, therefore, straight throughout ; a few faint paler markings in apex. J34 T. H. E. JACKSON Underside hind wing : pale brown, with very faint traces of submarginal and postdiscal lines. Length of fore wing : 17 mm. Neallotype $. FERNANDO Po : 3,000-4,000 ft., vi. 1926. T. A. Barns. Joicey Bequest. Known only from Fernando Po. An outlying member of this group is Epitola katherinae Poulton, in which the female is similar, but the light patch in fore wing is orange. Epitola katherinae Poulton n s - X 3. M- Type. UGANDA : Entebbe. $ unknown. Known only from the type. B. $ brown with large blue discal areas in both wings, but no postdiscal white line or blue spots ; occasionally the blue area in fore wing is distally white. Epitola staudingeri staudingeri Kirby (PI. 3, ng. 19, PI. 4, fig. 29) cJ Epitola staudingeri Kirby, 1890 : 271. Type. SIERRA LEONE. (Staudinger Coll.) Epitola staudingeri Kirby ; Seitz, 1920 : pi. 65, d. $. Legs dark brown, with much lighter scaling at the joints ; palps light brown with whitish lateral edges ; antennal shaft, black above, checkered white below ; club tipped bright orange. Upper side fore wing : dark brown, with dull blue basal area from inner margin to upper median vein covering the cell, but not extending beyond it ; distally very irregular and arranged as follows : a long sharply pointed streak in 5, extending half-way along the cellule ; a very small spot in the base of 4 ; a streak in 3, 5 mm.; the whole of i and 2 almost to the margin. Upperside hind wing : dark brown ; discal and basal dull blue patch from veins 1-6, not sharply defined distally ; a broad dark brown border 2-3 mm. but containing scattered blue scales ; costal border dark brown. Underside : clay coloured, slightly paler along inner margin of fore wing ; faint traces of two submarginal crenulate lines on both wings, otherwise unmarked. Length of fore wing : 20 mm. Neallotype $. SIERRA LEONE : Baudajuma, No. 1898. G. I. Arnold. Recorded from : SIERRA LEONE and NIGERIA. NOTES ON THE EPITOLINAE 135 Epitola staudingeri gordoni Druce . FR. EQUAT. AFRICA : Moy en Congo, Etoumbi. ix.ig6o. T. H. E. Jackson. Allotype c. Same data as holotype. Recorded from : GABOON and FR. EQUAT. AFRICA. Epitola mara Talbot (stat. n.) (PI. 3, fig. 20, PI. 4, fig. 30) P^ 2O > ^S 8 - T 9> 2 9 6* ; n g s - 2I . 22 ? Type. SE. NIGERIA : Isoba. Known only from the types. Epitola albomaculata Baker (J Epitola albomaculata Baker, 1903 : 329. Type. SIERRA LEONE. Epitola albomaculata Baker ; Seitz, 1920 : pi. 65, e. 9 Epitola albomaculata Baker, 1904 : 230. Recorded from : SIERRA LEONE : Moyamba ; NIGERIA : Warri. Epitola liana Roche (PI. 13, figs. 119, 125) 6* Epitola liana Roche, 1954 ' 5> pi- 2I > n s - 2 3- 2 4- Type. UGANDA : Bwamba. 9- Legs white ; palps white with black tips, frons white ; eyes brown ; antennal shaft black above ; finely checkered white below. Upperside fore wing : black with dark blue basal area from the upper median to inner margin and extending distad as follows : upper half of cell and space 4 white to within 3 mm. of margin ; base of spaces 2 and 3 blue and a large white spot mid-way in 2 ; space i blue, distally white to within 2 mm. of margin. A small black streak on the discocellular. NOTES ON THE EPITOLINAE 139 Upper side hind wing : dark grey ; blue basal patch from veins 1-6, covering half space 2 and the bases of 3-6 ; a large whitish spot mid-way in 5 and 6 and space 8 whitish ; a fine black streak on the discocellular ; fine black marginal line and fringes checkered. Underside : as in the male, but white ground colour more prominent. Length of fore wing : 15 mm. Neallotype $. UGANDA: Masaka, Sango Bay, Katera. viii.igSo. T. H. E. Jackson. Recorded from : UGANDA : Budongo, Katera and Bwamba. Epitola nitide Druce $ Epitola nitide Druce, 1910 : 336, pi. 34, fig. i. Type. CAMEROONS : Bitje, Ja River. Epitola nitida [sic] Druce ; Seitz, 1920 : 356. $ Epitola subalba Baker, 1915 : 190. Type. CAMEROONS : Bitje. Epitola nitide Druce ; Dufrane, 1953 : 50 [Redescription] . Recorded from : GHANA : Ho, Kapandu ; CAMEROONS : Bitje ; FR. EQUAT. AFRICA : Kelle ; UGANDA : Mukono, Katera. Epitola virginea Baker 9- Epitola virginea Baker, 1904 : 230. Type. SIERRA LEONE. $ Epitola virginea Baker ; Roche, 1954 : 5 OI > pi- 2O - n S s - T 7> l8 - Allotype (J. SIERRA LEONE : Daru. Recorded from : SIERRA LEONE : Moyamba, Daru ; GHANA : Kumasi. C. $$. Plain brown above. Epitola conception Suffert $ Epitola concepcion Suffert, 1904 : 54. Type. CAMEROONS : Barombi (Berlin Mus.). Epitola concepcion Suffert ; Seitz, 1920 : pi. 65, a. $ Epitola concepcion Suffert ; Aurivillius, 1923 : 1199. Allotype, S. CAMEROONS : Molundu. There are no specimens of this species in the British Museum (Nat. Hist.) or in the author's collection. Epitola elissa Grose-Smith (PI. 3, fig. 25; PI. 4, fig. 35) $ Epitola elissa Grose-Smith, 1898 : 354. Type. NIGERIA : Warri. Epitola oniensis Baker, 1913 : 501. Type. NIGERIA : Oni near Lagos. (Hope Dept., Oxford.) $. Legs brown with paler joints, almost checkered ; palps pale brown with black tips ; eyes black ; frons dark brown ; antennal shaft dark brown above, checkered below ; club yellow -tipped. Upperside : plain dark brown in both wings ; no markings. ENTOM. 12, 3. 9 140 T. H. E. JACKSON Underside fore wing : warm brown ; two faint dentate submarginal lines ; a stronger post- discal crescentric line from costa to vein 2 ; no other marks ; space i pale grey. Underside hind wing : warm brown ; traces of four-dentate lines all distad of the cell and broken into spots. Both wings with fine dark margins. Length of fore wing : 15 mm. Neallotype $. NIGERIA : Ogoja Prov., Ikom. 11.1956. T. H. E. Jackson. Recorded from : SIERRA LEONE : Moyamba ; NIGERIA : Ikom and Warri ; BR. CAMEROONS : Mamfe. Epitola ikoya Roche $, $ Epitola ikoya Roche, 1954 : 497- pi- T 9> ^S s - 5~6 2 <3 '> 3. 4 $ Type. CAMEROONS : Bitje, Ja River. Taken in cop. Recorded from : CAMEROONS : Bitje ; FR. EQUAT. AFRICA : Ketta and Mambili ; CONGO : Beni and Lubilinga Valley, Lubutu. Epitola carcina Hewitson $ Epitola carcina Hewitson, 1873 : 150. Type. NIGERIA : Old Calabar. cf, $ Epitola kholifa Baker, 1904 : 229. Type. SIERRA LEONE. pi- 22 > n s - 35> 3^- Type. UGANDA : Bwamba. Very similar to viridana Joicey & Talbot, but differs below. $. Legs brown and white checkered ; palps whitish, streaked black below with black tips, above basally whitish with long black tips ; frons dark brown ; antennal shaft black above, checkered white and black below ; club orange-tipped. Upperside : plain dark brown with four bluish postdiscal spots from 4-7 on fore wing. Underside : as in the male, cf. figure in Roche loc. cit.; the dark postdiscal band in hind wing below is plainly visible. Length of fore wing : 16 mm. Neallotype $. KENYA: Kakamega. ix.i937. T. H. E. Jackson. Males of this species were taken at Lake Nabugabo flying over clumps of bushes early in the morning. Recorded from : UGANDA : Bwamba and Lake Nabugabo ; KENYA : Kakamega. Epitola catuna Kirby (PI. 5, fig. 40 ; PI. 6, fig. 50) cj Epitola catuna Kirby, 1890 : 273. Type. CAMEROONS. (Staudinger Coll.) Epitola catuna Kirby ; Grose-Smith & Kirby, iv.i892 : Lye. Afr. pi. 17, figs, n, 12. 144 T. H. E. JACKSON Epitola catuna Kirby ; Seitz, 1920 : pi. 64, g. 9 Epitola mus Suffert, 1904 : 53 (syn. n.). Type. CAMEROONS : Barombi Station. (Berlin Mus.) Epitola mus Suffert ; Seitz, 1920 : pi. 65, e. The type of Epitola mus Suffert has been examined and proves to be a female of Epitola catuna Kirby. $ Legs brown with small pale spots on the joints ; palps dark brown above and below ; frons and eyes brown ; antennal shaft black above, checkered below ; club orange-tipped. Upperside : plain dark brown ; immaculate. Underside fore wing : brownish grey as in the male ; inner margin broadly pale, then base to vein 5 very slightly darker than ground colour, a few obscure marks in apical area. Underside hind wing : brownish grey ; three very faint crescentric lines in submarginal and postdiscal areas. Length of fore wing : 15 mm. Neallotype $. UGANDA: Bwamba, Bundibugyo. .1954. T. H. E. Jackson. Recorded from : FERNANDO Po ; SPANISH GUINEA : Riomuni ; BR. CAMEROONS : Barombi ; FR. CAMEROONS : Bitje ; GABOON : Kuilu ; FR. EQUAT. AFRICA : Ouesso and Etoumbi ; CONGO : Epulu, Beni, Ituri ; UGANDA : Bugoma, Budongo, Bwamba, Toro, etc. Epitola carpenteri Baker (PL 5, ng. 41, PL 6, fig. 51, PL 9, fig. 83, PL 10, fig. 93) cj Epitola carpenteri Baker, 1921 : 462. Type. UGANDA : Bugalla Is. Lutoboka. (Hope Dept., Oxford.) It has apparently been overlooked by Roche et al., that Baker described the male of the above species in his original description, loc. cit. and designated a holotype. This specimen has been examined in the Hope Dept., Oxford and found to belong to a species near catuna Kirby. Baker's allotype female belongs to a different species, Epitola azurea sp. n., which is described later in this paper. To add to the original description of the male, it may be said that carpenteri differs from catuna in the more prominent blue streaks on fore wing in spaces 4 and 5, in the wider black border in hind wing and in the different underside. In the former, the underside ground colour is warm brown instead of dark grey ; the black basal patch, fore wing, is much more prominent, as are also the darker submarginal and discal lines in hind wing. Further, it is larger ; length of fore wing ; 15 mm.; in catuna 13-14 mm. $. Upperside : plain dark brown in both wings, with some very scattered blue scales in the discal and postdiscal areas of the fore wing. Underside : as in the male, but paler ; the pale markings in the cell of fore wing less distinct. Length of fore wing : 14 mm. Neallotype?. UGANDA: Sesse Isles, Bugalla Is. ix-x.igsS. T. H. E. Jackson. Recorded only from : UGANDA : Sesse Isles, Bugalla and Entebbe. This species is very near catuna Kirby, but the differences are deemed sufficient to accord it specific rank, especially since catuna is known to occur very near Entebbe. Both sexes have been taken feeding on low shrubs among Crematogaster ants at the edge of the forest on Bugalla. NOTES ON THE EPITOLINAE 145 Epitola ghesquieri Roche (PL 5, fig- 43, PL 6, fig. 53) P^ 22 - n s - 3 1 - 3 2 - Roche (1954) was well aware that there were two forms of female associated with cephena Hewitson, but considered them to be varieties of the same thing. This, however, is incorrect ; the heavily marked form as figured in Seitz, belongs to cephena and agrees well with the female of the eastern subspecies entebbeana Baker and the more lightly marked insect is the female of mercedes Suffert. The type of Epitola mercedes Suffert has been examined, and there is no doubt that it is identical with the male described by Roche (1954) as cephena Hewitson. $. Legs brown with paler joints ; eyes black ; irons brown ; palps pale brown below, dark brown above ; antennal shaft black above, strongly checkered white below ; club orange- tipped. Upper side fore wing : greyish black ; blue postdiscal spots in 5 and 6 and a trace of a third in 7 ; two others, larger, about mid -way in spaces i and 2. No other marks. Upperside hind wing : greyish black ; a small rounded blue spot at the end of cell, but some- times unmarked, which is also true of the male. Underside fore wing : brownish grey ; postdiscal whitish spots in i and 2, as above, and in 4-6 ; jet black streak between veins 2-5, erupting into space 5, from base to i mm. of margin ; obscure crenulated submarginal lines. Underside hind wing : brownish grey with much grey scaling ; two obscure crenulated sub- marginal lines. Length of fore wing : 16 mm. Neallotype ?. NIGERIA: Lagos Dist., Oshodi. ^.1955. T. H. E. Jackson. Both sexes were seen at Oshodi flying low down, in deep shape under Crematogaster- infested trees. Recorded from : NIGERIA : Lagos Dist. ; CAMEROONS : Johann Albrechts Hohe. Epitola ouesso sp. n. (PI. 7, figs. 59, 60 ; PI. 8, figs. 69, 70) Nearest to cephena Hewitson in the male and to pinodes Druce and mercedes Suffert in the female. cJ. Legs dark brown with small paler joints ; palps dark brown above and below with some grey hairs ; frons black ; eyes brown ; antennal shaft black above, finely white checkered below ; club yellow-tipped. Upperside fore wing : black ; dark blue streak in lower half of cell and dark blue spots in extreme base of 2 and basal half of i. Upperside hind wing : black ; dark blue patch covering cell and basal half of 4 and 5 ; more cattered blue scales in 1-3 ; no postdiscal spots and no other markings. 148 T. H. E. JACKSON Underside fore wing : dark brown, no grey coloration ; black basal streak restricted by ground colour in 1-3 ; no postdiscal spots or other markings. Underside hind wing : dark brown, usual markings scarcely visible. $. Very similar to female mercedes Suffert differing only below, and in the extended blue in hind wing above. Upperside forewing : brownish black ; small blue postdiscal spots in 57, and in base of i and 2. Upperside hind wing : obscurely scaled blue from cell to mid-way in 4 and 5 and in the base of i and 2, otherwise brownish black. Underside fore wing : browner than in mercedes ; upper edge of black inner marginal patch perfectly straight along vein 5 ; in mercedes there is a broad extension mid-way into space 5 ; large postdiscal white spots in black area in i and 2 ; very small white spots in 4-7. Underside hind wing : brown, faint traces of submarginal and postdiscal crenulate lines. Length of fore wing : $ and ? 16 mm. Holotype <$. FR. EQUAT. AFRICA: Ouesso, Ketta Forest. X.IQSQ. T. H. E. Jackson. Allotype $. Same data as holotype. Recorded from : FR. EQUAT. AFRICA : Ouesso Dist. ; only the types. Epitola azurea sp. n. (PI. 7, fig. 61, PI. 8, fig. 71) $ Epitola carpenteri Baker, 1921 : 462, pi. 22, figs. 37, 38. Allotype. UGANDA : Dama Is., L. Victoria. (Hope Dept., Oxford.) The male associated with this female by Roche belongs to mpangensis sp. n. See below. o*. Legs brown with pale spots on joints ; palps pale whitish below with dark tips, black above ; frons whitish grey with broad brown median band ; antennal shaft black above, finely checkered white below ; club pale-tipped. Upperside fore wing : black with pale bright blue spots as follows : a spot in base of cell, another linear and irregular in centre, a large spot covering all of i to within 2 mm. of margin, another spot in base of 2 and a few blue scales in la ; a black spot of the ground colour usually, but not always present in upper centre of blue area in i. Upperside hind wing : black ; large pale bright blue discal area from veins 1-6 ; narrow black margin and black costal area. Underside fore wing : silvery grey ; black inner marginal streak bounded by vein 5 ; two very large silvery white spots in distal half of i and 2, almost obliterating the black area distally ; silvery crescentric submarginal lines ; three silvery spots in line, horizontally along upper edge of black area. Underside hind wing : silvery grey ; heavily irrorated with silver scales throughout ; sub- marginal and postdiscal silvery crescentric lines and a square silvery patch in the base of 4. Length of fore wing : 13 mm. This species differs from mpangensis sp. n. in the much paler brighter blue, the extended blue area of fore wing and in the smaller expanse. A series of males were taken in the type locality, with females and there is no doubt as to its identity. Holotype $. That described by Baker as allotype of E. carpenteri Baker. Allotype <$. UGANDA: Masaka, Sango Bay, Katera. .1956. T. H. E. Jack- son. NOTES ON THE EPITOLINAE 149 The males fly under the canopy, never venturing outside ; flight is fast but short and continues later than in most species up to about n a.m. The females fly later, laying on lichen-covered tree trunks. So far known only from this locality. Recorded from : UGANDA : Sango Bay, Katera, Dama Is., L. Victoria. Epitola mpangensis sp. n. (PL 5, ng. 48, PL 6, fig. 58) 6* Epitola carpenteri Baker ; Roche, 1954 : 5 OO > pi- 22 > n 8 s - 37- 3 8 - <. Described and figured by Roche, loc. cit., as carpenteri Baker. 9. Similar to azurea sp. n., but with much darker underside. Legs dark brown with pale spots on the joints ; palps dark grey below, pale grey above with black tips ; frons and eyes dark brown ; antennal shaft checkered white above and below ; club with minute yellow tip. Upperside fore wing : black ; four white blue-edged postdiscal spots in 4-7 ; a large white spot covering most of 2 ; space i blue, distally bluish white to within 2 mm. of margin, space i a blue from base to middle. Upperside hind wing : black ; large blue discal area from veins 1-6, distally paler ; border of even width about 3 mm. Underside fore wing : brownish grey ; postdiscal spots in 4-7 and i and 2 much larger than in azurea, the latter filling up most of the black inner marginal streak ; latter as in azurea ; submarginal lines merged into wide grey border. Underside hind wing : brownish grey with two submarginal and one postdiscal crenulate lines and square grey patch in 4 as in azurea ; scattered basal grey spots. Length of fore wing : 15 mm. This species can be distinguished from azurea in the male by the darker blue and more restricted spots on fore wing and by the greater expanse. In the female by the darker underside. Holotype <. That cited by Roche, loc. cit., as " Allotype " <$ Epitola carpenteri Baker. UGANDA : Bwamba. x.i94i. T. H. E. Jackson. Allotype ?. UGANDA: Mpigi, Mpanga Forest, viii.igsg. T. H. E. Jackson. Recorded from : CONGO : Lowa Valley and Katanga ; UGANDA : Bwamba and Mpigi. Epitola katerae sp. n. (PL 7, figs. 62, 63, PL 8, figs. 72, 73) In the male nearest to ghesquieri Roche, nigeriae sp. n. and mercedes Suffert of the previous group and in the female to azurea sp. n. and mpangensis sp. n. cJ. Legs brown with very small pale spots at the joints ; frons and eyes brown ; palps brown below with some grey hairs, brown above with black tips ; antennal shaft checkered black and white above and below (a very unusual character) ; club black, very minutely orange-tipped. Upperside fore wing : black ; immaculate. Upperside hind wing : black with dark blue discal basal patch between veins 1-6, covering only the basal portions of spaces 1-5 and ending distally in scattered blue scales ; a wide black distal border, 3-4 mm. and black costal border ; veins 2-4 black ; distal edge of blue patch ill-defined. Underside fore wing : dark grey ; black inner-marginal streak between veins 2-5 ; large pale grey square spot in distal part of i and ia ; postdiscal pale spots in 4-7, conjoined to form a line ; another larger silvery spot in 2 ; margin speckled with silvery scales. 150 T. H. E. JACKSON Underside hind wing : dark grey ; irrorated with silvery scales, the individual lines obscured ; a more prominent patch of silver scales in the base of 4 and 5. $. Very similar to azurea. Legs, eyes, palps and frons much as in male, but paler ; antennal shaft checkered on both surfaces as in male (in azurea jet-black above in both sexes). Upper side fore wing : greyish black ; large white, blue-edged postdiscal spots in 4-7, the latter a streak ; another, broad, elongate in 2 to i mm. of margin ; the whole of i to 2 mm. of margin light bluish ; basal half of la, also, bluish ; a small black streak from mid -way along median vein, invading blue area in i. Upper side hind wing : paler, blackish grey ; pale bluish basal-discal patch from veins 1-6, distal and costal borders of ground colour, former about 2 mm.; the blue area slightly paler distally. Underside fore wing : differs from azurea in the greater amount of dark ground colour and from mpangensis in the absence, as such, of the inner-marginal black streak, which in this species merges into the discal ground colour. Ground colour dark grey-brown ; large white patch on inner-margin comprising the postdiscal spots in i and 2 and covering the whole distal half of i and more than half 2 ; white postdiscal spots in 4-7 above ; a prominent thick white submarginal crenulate line ; apex and distal border thickly irrorated with silvery white scales. Underside hind wing : brownish grey ; the whole covered with silvery white scales with a more prominent silvery white patch in the base of 4 and 5 ; a dark crenulate submarginal line. Length of fore wing : $ and $, 16 mm. Holotype <$. UGANDA: Masaka, Sango Bay, Katera. viii.1956. T. H. E. Jackson. Allotype $. Same data as holotype. xi.i954. This species is, so far, only known from Katera, Masaka Dist., where the males were taken on an open hillside flying over small trees and bushes from about 9-9.30 a.m. The females were found laying on the lichen-covered trees among Cremato- gaster ants. Epitola rileyi Audeoud cJ, $ Epitola rileyi Audeoud ; 1936, 704, pi. 7, figs. 3 $ ; 4 $. Types. CAMEROONS : Lolodorf. (Audeoud, Coll. Geneva.) This species, probably belongs here, although it differs from all others in the crenulated margins to the wings. There are no specimens of this species in the British Museum (Nat. Hist.). Epitola kamengensis sp. n. (PI. 7, figs. 64, 65 ; PI. 8, figs. 74, 75) Near katerae sp. n., but larger and differing below. n g s - 2 3 Types. UGANDA : Katera. 152 T. H. E. JACKSON Epitola dolorosa Roche (J, $ Epitola dolorosa Roche, 1954 : 49$, pi- 21, figs. 27, 28 (J, 29, 30 .. Types.