62 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Mesothorax. Mesoprephragma with shallow emargination. Prescutum more than twice as 

 wide as long (average 237 and 106 y respectively) ; anterior margin strongly curved ; laterally 

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

 sclerotized medially and irregularly reticulated. Scutum. Median membranous area sub- 

 rectangular ; 120-133 (average 128) y long and 1-54-1-94 (average i-68) times as wide (width 

 201-236, average 213 y) ; with n-19 (average 15) h.s. Scutellum 76-86 (average 82) y long 

 and 201-228 (210) y wide, the ratio being 1 : 2-4-2-8 (average 2-6) ; tubular, with large ventral 

 foramen ; without setae. Postnotum with anterior margin usually regular and exposed ; 

 postnotal apophysis and postalare well developed, the latter densely reticulated distally. Meso- 

 postphragma with deep emargination. Mesopleuron. Mesopleural ridge strong, but interrupted 

 above coxal articulation ; pleural apophysis and pleural wing process well developed, the latter 

 connected with episternum by a narrow basalare. Subalare small. Episternum showing weak, 

 irregular reticulation ; subepisternal ridge well developed, but below membranous cleft indistinct 

 and only marked by a band of dark sclerotization. Epimeron small. Lateropleurite anteriorly 

 bounded by an extension from marginal ridge. Basisternum large, about 293 y wide and 231 u. 

 long, i.e. 1-66-1-95 (average i-8i) times longer than membranous area of scutum ; with strong 

 median ridge and bounded by strong marginal and precoxal ridges ; without setae. Furca well 

 developed. Mesothoracic spiracle with well developed peritreme ; postmesospiracular setae 

 absent. Tegula small, membranous bulge with a small weak sclerite posteriorly and 5-9 

 (average 7) h.s. Third axillary wing sclerite with a pronounced ventral projection at its base. 

 Additional sclerite small, but well defined. Antemetaspiracular setae absent. 



Metathorax. Metanotum with anterior margin usually weak medially ; suspensorial sclerites 

 small, rod-like ; a small, additional sclerite present anterior to postnotum. Postnotum con- 

 sisting of a transverse sclerite on each side. Metatergal setae : one h.s. on each side. Pleural 

 ridge well developed, though interrupted in middle ; with small wing process. Episternum 

 with anterior margin not ridge-like ; vestigial precoxal ridge present ; epimeron produced 

 posteriorly. Metathoracic spiracle similar to mesothoracic one. Dorsospiracular setae absent. 

 Postmetaspiracular setae : 4-9 (average 5-5) f.s. and 0-5 (average 2-5) h.s. Metasternum 

 represented by a weak, transverse plate. Anterior and posterior metasternal setae : 0-3 (average 

 o-8) and 0-1 (average o-6) h.s. respectively. 



Wings hyaline ; long (length 1650-1770, average 1713 y) and broad (width 750-860, average 

 818 pi), ratio width to length being 1 : 2-04-2-25 (average 2-09) ; alar lobe present ; alar setae 

 absent. Halteres well developed, 106-133 (average 123) y long and 23-33 (average 26) y wide, 

 each with one apically hooked seta which is about 68 y long. 



Legs moderately long and slender, with middle pair shortest and hind pair longest ; ratio 

 length of hind leg to body length is 1 : 1-76-1-85 (average i-8o). Length of segments (in y) : 



Leg 

 I 



II 



III 



Coxae each with 21-32 f.s. and 12-23 ns - '• f° re coxa with 1-3 (average 2) pointed coxal 

 bristles which are about \ as long as the segment ; apical seta about \ as long as the 

 trochanter. Trochanters 34-38 y wide ; with 6 oval sensilla, 13-20 f.s. and 7-10 h.s., the 

 latter including 2 minute setae near basal ridge, one small seta on outer margin and a long 

 apical seta which, on the fore trochanter, is 2-6-3-0 (average 2-7) times as long as width 

 of the trochanter. Femora of medium width (46-49 y), ratio width to length of hind 

 femur being 1 : 5-5-6-3 (average 5-8) ; each with 34-45 f.s. and 18-34 ns - Tibiae 

 27-30 y wide, ratio width to length of hind tibia being 1 : 14-1-17-3 (average 15-4) ; each 

 with 94-130 setae, of which 36-50 are h.s. and 56-80 f.s., the latter about as long as width of 



Coxa 



Trochanter 



Femur 



Tibia 



Tarsus 



Claw 



Total 



74-84 



105-118 



258-308 



456-4 8 3 



129-139 



23-27 



1062-1144 



(78) 



("3) 



(284) 



(467) 



(133) 



(25) 



(1101) 



91-103 



105-118 



250-277 



418-448 



129-137 



23-26 



1018-1100 



(96) 



(113) 



(266) 



(439) 



(134) 



(25) 



(1072) 



106-118 



110-118 



266-289 



429-479 



127-141 



25-29 



1068-1163 



(113) 



(116) 



(276) 



(45i) 



(136) 



(26) 



(1119) 



