9 8 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



wide) ; with 11-17 (average 13) f.s. of medium length, 1-6-2-3 (average 1-9) times longer than 

 width of segment ; with 1-3 usual sensilla basiconica. Segments IV-IX cylindrical ; lengths 

 of these segments (in \i) 205-228 (average 218), 137-171 (average 153), 98-129 (average 113), 

 95-118 (average 104), 72-91 (average 82) and 65-80 (average 73) respectively, widths varying 

 from 21 to 27 \l, with distal segments slightly wider than proximal ones ; with 38-49 (average 

 42), 28-35 (average 32), 24-31 (average 27), 22-33 (average 26), 17-25 (average 21) and 15-19 

 (average 17) f.s. respectively, but no h.s. ; antenna! bristles on segments VIII-IX distinctly 

 larger than f.s. Segment X : terminal \ constricted ; 72-95 (average 81) y. long and 24-27 

 (average 25) ;jl wide (near base) ; carrying 4-8 (average 6-i) f.s., 3 capitate snbapical setae and 

 5 antennal bristles of which the 3 long ones are about as long as segment and the 2 shorter ones 

 about as long as f.s. ; with 2 sensilla basiconica ventrally, one near apex and the other more 

 proximal. 



Thorax 730-779 (average 755) \x long. 



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

 pronotal sclerites medium-sized, without setae. Medial pronotal setae occasionally present, 

 consisting of 0-2 (average o-6) f.s. and 0-2 (average o-6) h.s. ; 2-5 (average 3-6) circular pores 

 present on each side posterior to pronotal sclerite. Post-tergites relatively large, with irregular 

 wavy striation and usually with some (0-3, average 1 -4) fleshy post-tergital setae on each side, 

 occurring on or behind the sclerite. Pleural structures typical of family. Sternum with strong 

 transverse ridge, a strong but interrupted median ridge, and an oval-shaped sclerite. Ante- 

 prostemal setae : 1-3 (average 2-4) f.s. on each side ; prosternal setae : 15-28 (average 21) 

 f.s., scattered over the sternal area and spreading into the area anterior to the spiracles, and 

 usually one (0-2, average 1) h.s. on each side of median ridge. 



Mesothorax. Mesoprephragma with deep emargination. Prescutum about if times as wide 

 as long (average 219 and 121 \i respectively) ; anterior margin strongly curved ; laterally 

 bounded by the prescutal ridges and posteriorly by the prescutal suture ; slightly more heavily 

 sclerotized medially ; with dense irregular reticulation. Scutum. Median membranous area 

 subrectangular ; 152-169 (average 157) pi long and 1-40-1-53 (average 1-45) times as wide 

 (width 213-243, average 227 y.) ; with 7-18 (average 11) f.s. and 14-22 (average 18) h.s. 

 Scutellum 65-72 jx long arid 220-247 (average 229) \l wide, the ratio being 1 : 3-1-3-8 (average 

 3-4) ; tubular, with small ventral foramen ; setae absent. Postnotum with anterior margin 

 weakly sclerotized, and usually regular and exposed ; postnotal apophysis and postalare well 

 developed, the latter densely reticulated distally and without setae. Mesopostphragma with 

 deep emargination. Mesopleuron. Mesopleural ridge strong, not interrupted above coxal 

 articulation ; pleural apophysis and pleural wing process well developed. Basalare vestigial, 

 incorporated into pleural wing process, not joining the latter with episternum. Subalare small. 

 Episternum showing irregular reticulation dorsally and polygonal reticulation ventrally ; 

 subepisternal ridge well developed, but below membranous cleft indistinct and only marked by a 

 band of dark sclerotization. Epimeron small. Eater opleurite not bounded anteriorly by an 

 extension from marginal ridge. Basisternum large, about 268 fi. wide and 228 [i long, i.e. 

 1-39-1-53 (average 1-45) times longer than membranous area of scutum ; with strong median 

 ridge and bounded by strong marginal and precoxal ridges ; with 2-9 (average 5 -4) f.s. posteriorly 



Fig. 34. Genus B, lateral view. 



