01 THE FAMILY COCCIDAK 117 



extending beyond the level of posterior margin of segment VIII, tapering, weakly sclerotized. 

 Dorsal setae : occasionally one or two f.s. on the 1st segment ; usually one h.s. on each side on 

 I and each of segments IV— VII. Pleural setae consisting of dorsopleural setae : 1-5 (average 

 21), 0-4 (average 15), 0-5 (average 17), 1-4 (average 26), 0-3 (average 2) and 0-4 (average 

 14) f.s., and 0-1 (average 0-2), 0-2 (average 0-9), 0-3 (average 15), 1-4 (average 28), 1-3 

 (average 2-1) and 0-2 (average 1 -6) h.s. on segments I— VI respectively, and ventropleural setae : 

 occasionally one f.s. on segments V— VI, sometimes one h.s. on IV and usually one on each of 

 segments V— VI. Segment VII with 4-8 (average 5-4) f.s. and 4-8 (average 5-9) h.s. ; some of 

 the posterior h.s. usually longer than the rest. Ventral setae : 9-18 (average 13), 6-16 (average 

 11), 9-14 (average 11), 5-1 1 (average 73), 4—1 1 (average 71) and 1-4 (average 2-7) f.s. on 

 segments II— VII respectively ; usually one h.s. on each side on segments [II— TV and 4 on each 

 of V-VII. 



Segment VIII with weak tergite and transverse sternite ; caudal extension forming a large, 

 papilla-shaped lobe with a small, membranous cicatrix laterally ; glandular pouch with 1 long, 

 pointed setae, whose protruding part is about twice as long as section within poach. Small I Xth 

 tergite sometimes present. Ante-anal setae : 2 strong h.s., which arc sometimes forked. 

 Posterior margin with 2-3 (average 2-8) h.s. on each side 



Genital segment. Penial sheath of medium-length, about \ total body length (ratio 1 : 4 40- 

 5-09, average 477), 342-361 (average 353) u. long and 36-42 (average 38) u. wide ; lateral 

 sclerotizations apparently not joined anterior to anus ; basal rod about J-§ as long as aedeagus, 

 extending anteriorly from the base of the aedeagus for about \-\ of distance to apex of the basal 

 membranous area ; apex of sheath without membranous extension Area from base of sheath to 

 tip of aedeagus with 20-30 (average 25) sensilla ; a cluster of small sensilla occurring ventrally 

 near apex of sheath. Aedeagus short (76-95, average 84 u. long), pem.il sheath and basisternum 

 longer, the ratios being 1 : 3-8-4-5 (average 4-2) and 1 : 1-84-2-25 (average 210) respectively. 



Material examined : 10 specimens, collected by M. S. K. Ghauri on Taxus baccata 

 L. at Imperial College Field Station, Silwood Park, Sunninghill, Berks., on 5. v. 57. 



This species is very closely related to P. corm (Bouche). The two species can be 

 separated by the number of fleshy pleural setae on the caudal extension of segment 

 VII. In P. pomeraniciim these setae vary from 4-8 (average 5) and in P. corni they 

 vary from 11-14 (average 12), 10-17 (average 15) and 11-25 (average 20) in the 

 specimens from Kazakstan, Warsaw and Belgrade respectively. In addition, the 

 pair of hair-like medial pronotal setae was absent in only one specimen of /\ 

 pomeraniciim, whereas only one medial pronotal seta was present in one specimen 

 of P. corni (from Warsaw). The ventral foramen of the scutellum is large in P. 

 pomeraniciim, its length being half or more than half that of the scutellum, while in 

 P. corni it is usually very small, although it was more than half as long as the 

 scutellum in one specimen from Belgrade. The posteromedian part of the post- 

 ocular ridge is usually weak in P. pomeraniciim, but strong in P. corni. 



CEROPLASTES 



Ceroplastes berliniae (Hall) 



(Text-figs. 41 and 42) 



A short, robust species, with comparatively short antennae and moderately long legs ; with 

 numerous setae covering the body and appendages. When mounted, total body length 1450- 

 1610 (average 1529) u. ; width at mesothorax 360-400 (average 372) u.. Wing expanse 2170- 

 2310 (average 2277) o.. 



