OF THE FAMILY COCCI DAE 63 



tibia ; apical spur about the same size on all tibiae. Tarsi z^-zj \j. wide, bind tarsus 51 5-3 

 (average 5-2) times longer than wide ; each with 13— ig f.s. and 15—22 h.s. ; tarsal digitules 

 subequal, longer than claw. Claws of medium length, about as long as width of tarsus ; 

 slightly cursed, with small denticle near tip ; ungual digitules subequal, about as long as c law 



Abdomen 620-710 (average 669) [i. long and 400-500 (average 446) ;z wide. 



Segments [-VII : tergites on segments II-1II represented by 3 small sclerites on anterior 

 margin, one medially and one on each side, and on A 1 1 bv a weak transverse plate in middle of 

 segment ; sternites present on all segments, represented bv a weak transverse plate on anterior 

 and posterior segments and a small sclerite on each side on intermediate segments. Caudal 

 extension of segment VII small, rounded, not sclerotized. Dorsal setae : h.s. only, usually one 

 on each side on each of segments 1 and V VI I and sometimes one or two on IV Pleural setae 

 consisting of h.s. only which include dorsopleural setae : up to 3 on 11,2 3 on III and usually 

 4 (range 3-5) on each of segments IV -VI, and ventropleural setae : usually one on segment VI 

 Segment VII with 6-10 (average 7-3) h.s. Ventral setae : lis only, occasionally one on each 

 side on II, usually one on each side on III and IV, and 4 on each side of segments V VII 



Segment VIII with transverse tergite and sternite ; caudal extension forming a small, simple 

 lobe ; glandular pouch with 2 long, pointed setae, whose protruding part is about twi< e as long 

 as section within pouch. No IXth tergite observed Ante-anal setae ; 2 long h.s. Posterior 

 margin with 3 h.s. on each side. 



Genital segment. Penial sheath short, about ,', total body length (ratio 1 : 5-49-6-00, average 

 5-86), 327-357 (average 342) u. long and 56-63 (average 60) u, wi le . lateral sclerotizations ool 

 joined anterior to anus ; length of basal rod about half that of aedeagus, the rod extending 

 anteriorly from base of aedeagus to the apex of the basal membranous area ; apex of sheath 

 without membranous extension. The area from base of sheath to tip oi aedeagus with 28 \2 

 (average 33) small setae ; a cluster of small sensilla occurring ventrally near apex of sheath 

 Aedeagus long (160-186, average 174 \x), penial sheath and basisternum longer, the ratios being 

 1 : 1 -8-2-1 (average 2) and 1 : 123 130 (average 1-34) respectively. 



Material examined : 10 specimens, collected by J. M. Cherret on Hedera helix L. 

 (ivy) in Bangor, Wales during May, 1962. Two specimens collected by N. S. 

 Borchsenius in the Crimea, USSR on 24. v. 54 agreed well with the above description, 

 but were somewhat smaller, measuring 1680 and 1720 (x. The same is true for 4 

 specimens collected by J. Rehacek on Hedera helix L. during May, 1953 in Czecho- 

 slovakia ; they measured 1660, 1680, 1760 and 1830 0.. 



CTENOCHITON 



Ctenochiton sp. 



(Text-hgs. 16 and 17) 



A moderately small and slender species, with comparatively long antennae and moderatelv 

 long legs ; with numerous setae on the appendages, but few on the body itself. When mounted, 

 total body length 1601-1929 (average 1754) u. ; width at mesothorax 240-280 (average 258) [i. 

 Wing expanse 3052-3265 (average 3178) jz. 



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

 anterodorsal bulge not pronounced ; length from apex to pronotal ridge 220-258 (average 237) 

 ji,, width across genae 240-280 (average 256) ;x. Median crest sclerotized and striated posteriorly, 

 but not polygonally reticulated ; with 9-15 (average 12) hair-like dorsal head setae. Mid- 

 cranial ridge dorsally absent ; ventrally narrow but well defined, reaching postocular ridge 

 posteriorly, surrounding area not reticulated. Genae large, sclerotized ; polygonal reticulation 

 enclosing weaker, irregular reticulation ; without setae. Eyes : four pairs ; dorsal and 

 ventral pairs large, subequal ; lateral pairs smaller, subequal ; corneae of dorsal eyes 19-27 



