84 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Coxae each with 7-15 f.s. and 9-15 h.s. ; fore coxa without coxal bristles ; apical seta long, 

 about as long as trochanter. Trochanters 26-30 [i wide ; with 6 oval sensilla, 5-12 f.s. and 

 7-1 1 h.s., the latter including 2 minute setae near basal ridge, one small seta on the outer margin 

 and one long apical seta which, on the fore trochanter, is 3-1-5-0 (average 4-1) times as long as 

 width of trochanter. Femora of medium width (34-42 u.), ratio width to length of hind femur 

 being 1 : 4-0-4-9 (average 4-6), each with 6-14 f.s. and 14-32 h.s. Tibiae 21-25 ^ wide, ratio 

 width to length of hind tibia being 1 : 10-3-13-1 (average 11 -6) ; each with 48-62 setae, of 

 which 30-52 are h.s. and 9-18 f.s., the latter about i£ times as long as width of tibia ; apical 

 spur about the same size on all tibiae. Tarsi 19-23 |j. wide, hind tarsus 4-3-4-8 (average 4-6) 

 times longer than wide ; each with 0-3 f.s. and 21-30 h.s. ; tarsal digitules subequal, slightly 

 longer than claw. Claws long, about 1 J times as long as width of tarsus ; slightly curved, with 

 small denticle near tip ; ungual digitules subequal, about as long as claw. 



Abdomen 470-600 (average 563) y. long and 250-300 (average 272) jx wide. 



Segments I-VII : tergites absent ; sternites consisting of transverse plates on all segments, 

 these usually less well sclerotized medially. Caudal extension of segment VII small, rounded 

 and weakly sclerotized lateroventrally. Dorsal setae : 0-3 (average o-8), 0-6 (average 2-5), 

 7-16 (average 9-7), 3-8 (average 4-9), 2-6 (average 3-4) and 2-6 (average 3-6) f.s. on segments 

 II-VII respectively, and usually with one h.s. on each side on segments I and IV-VII. Pleural 

 setae absent on segments I— III, and on IV-VI represented by h.s. only, which include dorso- 

 pleural setae : sometimes one on IV and usually 2 on segments V-VI, and ventropleural setae : 

 usually one on each of segments V and VI. Segment VII with 1-8 (average 3-6) f.s. and 3-6 

 (average 4-8) h.s., some of the posterior h.s. somewhat longer than rest. Ventral setae : 

 segments II to VII with 8-22 (average 14), 6-21 (average 13), 8-18 (average 11), 6-15 (average 

 12), 9-14 (average 12) and 8-15 (average 13) f.s. repectively ; h.s. ; none on II, sometimes one 

 on each side on III and IV, and usually 4 (4-5) on each of segments V-VII. 



Segment VIII with irregular tergite and transverse sternite, the latter carrying 0-3 (average 

 1 -4) 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 : 1-4 (average 2-7) f.s. and occasionally one short or long h.s. 

 Posterior margin with 3 h.s. on each side. 



Genital segment. Penial sheath of medium length, about \ total body length (ratio 1 : 4 53- 

 5-16 (average 4-95), 289-308 (average 300) ;x long and 30-36 (average 34) \i wide, lateral sclero- 

 tizations narrowly joined anterior to anus ; basal rod 1^—2 times as long as aedeagus, extending 

 anteriorly from the base of the latter for ^— f of the distance to the apex of the basal membranous 

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

 tip of aedeagus with 25-36 (average 30) small setae ; a cluster of small sensilla occurring 

 ventrally near apex of sheath. Aedeagus short (61-69, average 65 fi. long), penial sheath and 

 basisternum longer, ratios being 1 : 4-3-5-1 (average 4-7) and 1 : 1-78-2-19 (average 1-99) 

 respectively. 



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

 by myself on leaves of Festuca rubra L. at the Imperial College Field Station, Silwood 

 Park, Sunninghill, Berks. ; males emerged during September, 1963 ; the species 

 was found to be bivoltine in the field. 



This species can readily be separated from Eriopeltis sp. by the truncate or rounded 

 apex of the cranial apophysis, the absence of the lateral arms of the midcranial ridge 

 and the better developed median ridge of the mesosternum. In addition the post- 

 tergital region, and the anterior arms and membranous area of the mesoscutum are 

 not reticulated. 



