38 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



When mounted, total body length 2440-2700 (average 2569) y. ; width at mesothorax 570-660 

 (average 601) y. Wing expanse 3950-4550 (average 4296) y. 



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

 anterodorsal bulge not pronounced ; length from apex to pronotal ridge 274-319 (average 

 303) y, width across genae 296-338 (average 315) y.. Median crest sclerotized and distinctly 

 polygonally reticulated ; with 3-7 (average 5-3) hair-like dorsal head setae, arranged in two 

 groups : one, with 2-4 (average 3-3) short setae, posterior to the level of the dorsal eyes, and 

 the other with 0-4 (average 2) longer setae, anterior to the eyes. Midcranial ridge dorsally 

 represented by a short, weak ridge anterior to the level of the eyes ; ventrally narrow but well 

 defined, reaching ocular sclerite posteriorly, with surrounding area showing weak, polygonal 

 reticulation posteriorly. Genae large, sclerotized, weakly polygonally reticulated, without 

 setae. Eyes : five pairs ; dorsal and ventral pairs large, subequal, lateral pairs smaller, sub- 

 equal ; corneae of dorsal eyes 34-42 (average 38) y. in diameter and 2-2-2-9 (average 2-5) times 

 as much apart ; those of the ventral eyes 32-42 (average 35) y in diameter and 1 -i-i -6 (average 

 1-3) times as much apart. Ocellus small. Ocular sclerite well sclerotized except between the 

 ventral eyes where the cuticle is produced into a keel ; polygonally reticulated throughout. 

 Preocular ridge extending only a short distance below articular process. Postocular ridge very 

 weak dorsally, sometimes missing posterior to ocellus ; well developed lateroventrally, but 

 weak posteromedially ; below the ocellus the ridge splits up, with the anterior branch partly 

 surrounding ocellus. Interocular ridge absent. Dorsal ocular setae absent. Ventral head setae 

 consisting of 1-5 (average 3-2) h.s., situated anterior to the ocular sclerite on each side of the 

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

 apex bifurcate or occasionally truncate, not quite reaching level of anterior margin of ventral 

 eyes. Mouth opening irregular. Anterior tentorial pits absent. 



Antennae 10-segmented ; filiform ; 895-1075 (average 988) y long, i.e. shorter than half 

 body length (ratio 1 : 2-46-2-92, average 2-62) ; shorter than posterior leg (ratio 1 : 0-73-0-87, 

 average o-8o) and longer than penial sheath (ratio 1 : 1-16-1-50, average 1-31). Scape 

 57-68 (average 61) y. long and 57-67 (average 62) y. wide, with 3 h.s. Pedicel with distinct, 

 polygonal, dorsal reticulation ; 49-57 (average 54) |j. long and 49-57 (average 53) y wide, with 

 0-3 (average 1) f.s., 2-4 (average 2-9) h.s. and a sensillum placodeum. Segment III club- 

 shaped, 1-8-2-2 (average 2) times longer than wide (84-106, average 90 y long and 42-49, 

 average 45 y wide) ; with 4-12 (average 8-5) h.s. and 4-12 (average 5-8) f.s., the latter of 

 medium length, 0-7-1-0 (average 0-9) times as long as width of segment ; with 4-9 usual 

 sensilla basiconica. Segments IV-IX cylindrical ; lengths of these segments (in y) 114-171 

 (average 152), 137-160 (average 149), 106-148 (average 131), 95-122 (average 112), 80-95 

 (average 90) and 68-91 (average 78) respectively, widths varying from 30 to 42 y, with distal 

 segments wider than proximal ones ; with 18-53 (average 33), 33-55 (average 44), 26-46 

 (average 37), 28-43 (average 36), 22-32 (average 27), 18-34 (average 25) f.s. respectively, but 

 no h.s. ; antennal bristles on segments VIII-IX thicker than f.s. Segment X : terminal part 

 not constricted ; 57-84 (average 72) y long and 30-38 (average 33) y wide ; carrying 8-14 

 (average 12) f.s., 3 capitate subapical setae and 5 antennal bristles of which the 3 long ones are 

 about half as long as the segment and the 2 shorter ones about as long as the f.s., though 

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



Thorax 806-901 (average 864) y. long. 



Prothorax. Pronotal ridge strong, but medially interrupted by weak sclerotization. Lateral 

 pronotal sclerites large, without setae. Medial pronotal setae absent. Post-tergites medium- 

 sized, without striations and without setae. Pleural structures typical of the family. Sternum 

 with strong transverse ridge, interrupted median ridge and a triangular sclerite. Anteprosternal 

 setae absent ; prostemal setae 0-3 (average o-8) h.s. 



Mesothorax. Mesoprephragma with shallow emargination. Pre scutum about twice as wide 

 as long (average 268 and 138 y respectively) ; anterior margin slightly curved ; laterally 

 bounded by the prescutal ridges and posteriorly by the prescutal suture ; sometimes with very 

 weak polygonal reticulation. Scutum. Median membranous area transverse ; 80-106 (average 



