120 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



(average i -7) fleshy postalary setae occurring on or immediately posterior to it. Mesopost- 

 phragma with deep emargination. Mesopleuron. Mesoplenral ridge strong, not interrupted 

 above coxal articulation ; pleural apophysis and pleural wing process well developed. Basalare 

 absent. Subalare small. Episternum distinctly polygonally reticulated ; subepisternal ridge 

 well developed, but below membranous cleft indistinct and only marked by a band of dark 

 sclerotization. Epimeron small. Later opleurite partly bounded anteriorly by an extension 

 from marginal ridge. Basisternum large, about 223 ;x wide and 171 [i long, i.e. 1-48-1-77 

 (average 1 -65) 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 : 18-29 (average 

 24) f.s., arranged in a band behind the spiracles and prosternum. Tegula small, membranous 

 bulge with a small weak sclerite posteriorly and with 4-8 (average 6-3) h.s. Third axillary wing 

 sclerite with a pronounced ventral projection at its base. Additional sclerite small. Antemeta- 

 spiracular setae : 1-5 (average 2-7) f.s. 



Metathorax. Metanotum with thickening of posterior margin desclerotized medially ; 

 suspensorial sclerites absent. Postnotum consisting of two small sclerites, one on each side. 

 Metatergal setae : 2-7 (average 3-6) f.s. on each side but no h.s. Pleural ridge considerably 

 reduced, extending only a short distance above coxal articulation. Vestigial precoxal ridge 

 present. Episternum reduced to a small subtriangular plate ; epimeron produced posteriorly. 

 Metathoracic spiracle similar to mesothoracic one. Dorsospiracular setae : 3-9 (average 5-5) 

 f.s. Postmetaspiracular setae : 12-16 (average 14) f.s. and 0-2 (average o-6) h.s. Metasternal 

 plate weak and irregular, but more heavily sclerotized anteriorly. Anterior and posterior 

 metasternal setae : 36—48 (average 41) and 18-29 (average 23) f.s. respectively. 



Wings hyaline; short (length 920-980, average 968 \l) and comparatively broad (width 450- 

 480, average 465 [±), the ratio width to length being 1 : 2-00-2-18 (average 2-08) ; alar lobe and 

 alar setae absent. Halteres absent. 



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

 of hind leg to body length is 1 : 1-75-1-86 (average 1-79). Length of segments (in \i) : 



Tibia Tarsus Claw Total 



289-325 106-122 21-23 7 2 4-798 



(310) (113) (22) (770) 



304-338 1 12-125 20-23 744- 8l 3 



(319) (119) (22) (780) 



338-365 122-133 22-24 825-876 



(352) (127) (23) (854) 



Coxae : with 8-13 (average 11), 13-22 (average 16) and 20-29 (average 24) f.s., and 6-10 

 (average 8-2), 9-14 (average 11) and 14-17 (average 15) h.s. on the fore, middle and hind coxa 

 respectively ; fore coxa without coxal bristles ; apical seta about § as long as trochanter. 

 Trochanters 23-34 (* wide ; with 6 oval sensilla ; with 9-14 f.s. on the fore and middle trochanter 

 and 15-24 (average 19) on the hind one, and each with 6-10 h.s., the latter including 2 minute 

 setae near basal ridge, one small seta on the outer margin and a long apical seta which, on the 

 fore trochanter, is 1 -32-1 -77 (average 1 -52) times as long as the width of trochanter. Femora of 

 medium width (37-45 u.), with ratio width to length of hind femur 1 : 4-1-4-4 (average 4-2) ; 

 with 24-35 f.s. and 8-16 h.s. Tibiae 19-27 u. wide ; ratio width to length of hind tibia 1 : 12-8- 

 15-9 (average 14-3) ; each with 81-111 setae of which 21-30 are h.s. and 58-83 f.s., the latter 

 about 1 \ times longer than width of tibia ; apical spur about the same size on all tibiae. Tarsi 

 17-21 \x wide, hind tarsus 6-4-6-6 (average 6-5) times longer than wide ; each with 17-27 f.s. 

 and 6-1 1 h.s. ; tarsal digitules subequal, slightly longer than claw. Claws of medium length, a 

 little longer than width of tarsus ; slightly curved, with small denticle near tip ; ungual 

 digitules subequal, about as long as claw. 



Abdomen 380-450 (average 409) (x long and 330-380 (average 345) (x wide. 



Segments I-VII : tergites represented by a small transverse sclerite on each side on anterior 

 margin of segments II— III and a weak transverse plate on VI-VII ; sternites represented by a 



Leg 



Coxa 



Trochanter 



Femur 



I 



49-61 



68-76 



186-205 





(54) 



(73) 



(197) 



II 



65-74 



80-89 



158-175 





(7o) 



(84) 



(166) 



III 



76-84 



89-95 



175-186 





(80) 



(92) 



(180) 



