OF THE FAMILY COCCIDAL 81 



I— III and on IV— VI represented by h.s. only, which include the dorsoplenral setae : usually- 

 one on IV and 2 on segments V-VI, and ventropleural setae : occasionally one on \ r and usually 

 one on segment VI. Segment VII with 0-6 (average 2-8) f.s. and 5-7 (average 5-8) h.s., some 

 of the posterior h.s. somewhat longer than rest. Ventral setae : segments II— VII with 10-18 

 (average 15), 7-16 (average 12), 7-13 (average 10), 7-14 (average 11), 7-12 (average 9) and 

 8-14 (average n) f.s. respectively ; h.s. : none on II, usually one on each side of III— IV, and 

 usually 4 (range 3-5) on each of segments V— VII . 



Segment VIII with irregular tergite and transverse sternite, the latter carrying 0-2 (average 

 1-3) f.s. ; caudal extension forming a small, simple lobe ; glandular pouch with 2 long, pointed 

 setae, whose protruding part is 4-6 times as long as section within pouch. Small IXth tergite 

 present. Ante-anal setae : 4-9 (average 5-8) f.s. and an occasional h.s. Posterior margin 

 with 3-4 (average 31) h.s. on each side. 



Genital segment. Penial sheath of medium length, about j— j total body length (ratio 

 1 : 4-5-4-9, average 4-7), 314-342 (average 332) u. long and 29-36 (average 32) ;j. wide ; lateral 

 sclerotizations narrowly joined anterior to anus ; basal rod about 1 .J times as long as aedeagus, 

 extending anteriorly from base of aedeagus to between £ and J of the length from base of the 

 latter to apex of the basal membranous area ; apex of sheath without membranous extension. 

 Area from base of sheath to tip of aedeagus with 27-37 (average 32) small setae ; a cluster of 

 small sensilla occurring ventrally near apex of sheath. Aedeagus short (68-80, average 75 u. 

 long), penial sheath and basisternum longer, the ratios being 1 : 4-14-9 (average 4-5) and 

 1 : 1-57-1-04 (average 1-74) respectively 



Material examined : 10 specimens, bred in the laboratory from material collected 

 by myself on leaves of Agrostis tenuis Sibth. at the Imperial College Field Station, 

 Silwood Park, Sunninghill, Berks. ; males emerged during September, 1962 ; the 

 species was found to be bivoltine in the field. 



Eriopeltis Yfestucae (Fonscolombe) 

 (Text-figs. 26 and 25) 



Living specimens light reddish brown ; short, slender, with comparatively long antennae and 

 short legs ; with many setae on body and appendages. When mounted, total body length 

 1360-1570 (average i486) pt ; width at mesothorax 280-310 (average 293) [i. Wing expanse 

 2730-2920 (average 2820) fjt. 



Head subconical in dorsal view ; in lateral view flat, not obliquely elongated dorsoventrally, 

 anterodorsal bulge not pronounced ; length from apex to pronotal ridge 175-201 (average 190) 

 [x, width across genae 182-201 (average 195) u.. Median crest sclerotized, distinctly polygonally 

 reticulated, with 6-9 (average 7-8) hair-like dorsal head setae. Midcranial ridge dorsally absent; 

 ventrally reduced to a shorter or longer median bar without lateral arms, surrounding area 

 sclerotized and showing distinct polygonal reticulation. Genae large, weakly sclerotized, with 

 distinct polygonal reticulation ; without setae. Eyes : two pairs, subequal ; corneae of 

 dorsal eyes 17-23 (average 20) jx in diameter and 3-3-4-2 (average 3-7) times as much apart ; 

 those of the ventral eyes 19-23 (average 21) (i. in diameter and 1-5-1-9 (average 1-7) times as 

 much apart. Ocellus small, situated on a distinct protuberance which overhangs the postocular 

 ridge. Ocular sclerite well sclerotized, distinctly polygonally reticulated throughout. Pre- 

 ocular ridge long, the ridges of each side ventrally meeting or almost meeting each other medially. 

 Postocular ridge well developed and distinct throughout. Interocular ridge broadly joining pre- 

 and postocular ridges below ocellus. Dorsal ocular setae absent. Ventral head setae : 12-25 

 (average 18) f.s. and 7-17 (average 12) h.s., arranged in a broad band on anterior part of the 

 ocular sclerite, usually also with some (0-2, average 1) f.s. and some (0-3, average 1) h.s. occurring 

 in the area anterior to this sclerite, but with none between the eyes. Preoral ridge absent. 



