68 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Head subconical in dorsal view ; in lateral view dorsoventrally elongated ; long and narrow, 

 length from apex to pronotal ridge 357-456 (average 420) u. and width across genae 285-342 

 (average 315) u.. Median crest sclerotized and densely polygonally reticulated ; with 5-7 

 (average 5 -7) hair-like dorsal head setae anteriorly. Midcranial ridge dorsally absent ; ventrally 

 narrow but well defined, reaching postocular sclerite posteriorly, surrounding area polygonally 

 reticulated. Genae large, sclerotized ; polygonal reticulation enclosing weaker, irregular 

 reticulation ; without setae. Eyes : five pairs ; dorsal and ventral pairs large, subequal ; 

 lateral pairs smaller, subequal ; corneae of dorsal eyes 40-47 (average 43) \x in diameter and 

 1-4-2-1 (average 1-7) times as much apart, those of the ventral eyes 42-49 (average 46) \i in 

 diameter and 0-9-1 -i (average 1) times as much apart. Ocellus small. Ocular sclerite well 

 sclerotized and densely polygonally reticulated throughout. Preocular ridge with ventral part 

 reaching or almost reaching midcranial ridge. Postocular ridge weak dorsally, well developed 

 lateroventrally, and narrow but well defined posteromedially ; below ocellus the ridge splits up, 

 with anterior branch partly surrounding ocellus. Interocular ridge absent. Dorsal ocular 

 setae absent ; ventral head setae : 3-5 (average 4-4) h.s., situated anterior to ocular sclerite on or 

 near midcranial ridge. Preoral ridge present. Tendon-like apodeme long. Cranial apophysis 

 short ; apex truncate, not reaching level of anterior margin of ventral eyes. Mouth opening 

 irregular. Anterior tentorial pits situated anterolateral to mouth opening. 



Antennae 10-segmented, filiform ; 1691-2120 (average 1922) \i long, i.e. longer than half 

 body length (ratio 1 : 1-46-1-55, average 1-50), longer than posterior leg (ratio 1 : 1-10-1-17, 

 average 1-13) and longer than penial sheath (ratio 1 : 3-50-4-04, average 3-89). Scape 80-99 

 (average 93) ^i long and 76-95 (average 86) [x wide, with 3 h.s. and 2-4 (average 2-6) f.s. Pedicel 

 with distinct, polygonal, dorsal reticulation ; small, 61-84 (average 73) u. long and 57-68 

 (average 64) |j. wide ; with 1-3 (average 2-1) f.s., 2-4 (average 2-6) h.s. and a sensillum placo- 

 deum. Segment III long, cylindrical, 4-6-6-3 (average 5-3) times longer than wide (209-258, 

 average 228 \x long and 38-48, average 43 u. wide) ; with 6-1 1 (average 8-3) h.s. and 15-26 

 (average 21) f.s., the latter, as on the other antennal segments, very long, 4-5 (average 4-5) 

 times as long as width of segment III ; with 1-3 usual sensilla basiconica. Segments IV— IX 

 cylindrical ; lengths of these segments (in y.) 213-274 (average 248), 235-281 (average 264), 

 232-312 (average 277), 194-274 (average 235), 156-205 (average 186) and 1 18-156 (average 

 145) respectively, all of about the same width, varying from 27 to 38 \i ; with 15-28 (average 

 21), 17-26 (average 23), 18-31 (average 24), 18-26 (average 22), 12-18 (average 15) and 9-14 

 (average 12) f.s. respectively, but no h.s. ; antennal bristles on segments VIII-IX distinctly 

 thicker than f.s. ; one or two f.s. near apex of each segment short, shorter than width of 

 segment. Segment X : terminal part not constricted ; 125-213 (average 172) \i long, and 

 29-34 (average 31) u. wide ; carrying 6-1 1 (average 8-2) f.s., 3 capitate subapical setae and 5 

 antennal bristles of which the 3 long ones are about f as long as the segment and the 2 short 

 ones thin and shorter than the f.s. (one shorter than the other, about as long as width of segment) ; 

 with 2 sensilla basiconica ventrally, one near apex and the other more proximal. 



Thorax 832-1 113 (average 1015) u. long. 



Fig. 19. Ericerus pela (Chav.), lateral view. 



