ioo MORPHOLOGY AND TAXONOMY OF ADULT MALES 



10), 4-9 (average 5-9), 4-11 (average 7-2), 4-11 (average 6-8) 2-9 (average 5) and 1-5 (average 

 2-6) f.s. on II-VI, and 0-1 (average 0-3), 1-3 (average 1-9), 2-4 (average 3-1), 2-4 (average 3-1) 

 and 2-5 (average 3-2) h.s. on segments III-VI respectively, and of ventropleuval setae : occa- 

 sionally one or two f.s. on IV, 0-3 (average 15) on V and 0-5 (average 2-4) on the VI, with 

 occasionally one h.s. on III and usually one on each of segments IV-VI. Segment VII with 

 10-16 (average 14) f.s. and 3-6 (average 4-7) h.s., some of the posterior h.s. usually longer than 

 rest. Ventral setae : 17-26 (average 21), 18-28 (average 24), 10-21 (average 16), 9-15 (average 

 12), 4-10 (average 6-7) and 3-10 (average 6-2) f.s. on segments II— VII respectively ; usually 

 one h.s. on each side on segments II-IV and 4 on each of V-VII. 



Segment VIII with weak tergite and transverse sternite ; caudal extension forming a genicu- 

 late lobe, with a large, weakly reticulated, membranous cicatrix posteriorly ; glandular pouch 

 with 2 long, pointed setae, whose protruding part is 2-2^ times as long as section within pouch. 

 Small IXth tergite present. Ante-anal setae : usually 2 strong h.s., with occasionally one or two 

 additional small h.s. and with 1-5 (average 25) small, circular pores. Posterior margin with 

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



Genital segment. Penial sheath short, about \ total body length (ratio 1 : 5-6-6-1, average 

 5-9), 334-367 (average 352) \x long and 34-42 (average 38) (j. wide ; lateral sclerotizations 

 narrowly joined anterior to anus ; length of basal rod i|— 2 times that of aedeagus, extending 

 anteriorly from the base of the aedeagus for about J of the distance to the apex of the basal 

 membranous area ; apex of sheath without membranous extension. The area from base of 

 sheath to tip of aedeagus with 23-34 (average 28) small setae ; a cluster of small sensilla occur- 

 ring ventrally near apex of sheath. Aedeagus short (57-72, average 67 y. long), penial sheath 

 and basisternum longer, the ratios being 1 : 4-8-6-1 (average 5-3) and 1 : 3 11-3-93 (average 

 3-43) respectively. 



Material examined : 10 specimens ; from leaves of unknown plant ; collected 

 in Goba, Ethiopia on 6.viii.62 by members of Imperial College Expedition ; identifi- 

 cation by K. Boratynski. 



PUL VINARIA 



Pulvinaria fbetulae (Linnaeus) 



(Text-figs. 35 and 36) 



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

 with numerous setae covering the body and appendages ; wings with a faint purplish tinge 

 between anterior margin and 1st wing vein. When mounted, total body length 1 800-2010 

 (average 1885) \x ; width at mesothorax 415-460 (average 434) jj.. Wing expanse 3070-3320 

 (average 3170) u.. 



Head subconical in dorsal view ; in lateral view dorsoventrally elongated, with anterodorsal 

 bulge pronounced ; length from apex to pronotal ridge 247-288 (average 269) jjl, width across 

 genae 247-266 (average 257) [i. Median crest sclerotized and distinctly polygonally reticulated ; 

 with numerous (20-34, average 28) fleshy dorsal head setae and 5-8 (average 6-7) hair-like ones. 

 Midcranial ridge dorsally weak and irregular ; ventrally narrow, but well defined, reaching 

 ocular sclerite posteriorly, area surrounding ventral part showing weak polygonal reticulation. 

 Genae large, weakly sclerotized and without polygonal reticulation ; each with 11-28 (average 

 20) fleshy and 1-5 (average 3) hair-like genal setae. Eyes : two pairs, subequal ; corneae of 

 dorsal eyes 30-34 (average 32) \i in diameter and 1-1-1-8 (average 1-5) times as much apart ; 

 those of the ventral eyes 30-34 (average 32) \i in diameter and o-6-i-o (average 0-7) times as 

 much apart. Ocellus small. Ocular sclerite well sclerotized dorsally, but weak ventrally ; 

 polygonally reticulated throughout. Preocular ridge extending only a very short distance 

 below articular process. Postocular ridge well developed throughout ; below ocellus the ridge 

 splits up, with the anterior branch partly surrounding the ocellus. Interocular ridge absent. 



