n6 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



apophysis and pleural wing process well developed. Basalare vestigial, incorporated into pleural 

 wing process, not joining the latter with episternum. Subalare small. Episternum showing 

 polygonal reticulation dorsally ; subepisternal ridge well developed, but below membranous 

 cleft indistinct and only marked by a band of dark sclerotization. Epimeron small. Latero- 

 pleurite not bounded anteriorly by an extension from marginal ridge. Basisternum large, about 

 240 [x. wide and 179 u. long, i.e. 1-48-1-74 (average i-6i) 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 numerous, consisting of 54-64 (average 57) f.s. and 2-5 (average 3-8) 

 h.s., arranged in a broad band behind the spiracles and prosternum. Tegula small, membranous 

 bulge with a small weak sclerite posteriorly and with 3-9 (average 5-4) h.s. Third axillary wing 

 sclerite with a small ventral projection at its base. Additional sclerite small, well sclerotized. 

 Antemetaspiracular setae : 2-8 (average 5-3) f.s. 



Metathorax. Metanotum with posterior margin desclerotized medially ; suspensorial sclerites 

 absent. Postnotum consisting of a small transverse sclerite on each side. Metatergal setae : 

 0-3 (average o-6) f.s. and 1-3 (average 1-3) h.s. on each side. Pleural ridge considerably 

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

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

 Metathoracic spiracle similar to mesothoracic one. Dorsospiraculav setae : 3-1 1 (average 7-8) 

 f.s. and 0-3 (average 1) h.s. Postmetaspiracular setae : 14-24 (average 18) f.s. and 1-4 (average 

 2-2) h.s. Metasternal sclerite represented by a weak, transverse plate. Anterior and posterior 

 metasternal setae : 56-74 (average 64) and 20-32 (average 28) f.s. respectively. 



Wings hyaline; short (length 1 130-1290, average 1210 jx) but comparatively broad (width 

 520-590, average 557 (j.), ratio width to length being 1 : 2-15-2-20 (average 2 17) ; alar lobe 

 and alar setae absent. Halteres absent. 



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

 to body length is 1 : 1-69-1-84 (average 1-77). Length of segments (in ^) : 



Leg 



Coxa 



Trochanter 



Femur 



Tibia 



Tarsus 



Claw 



Total 



I 



61-72 



76-87 



222-241 



338-372 



118-141 



24-27 



868-918 





(67) 



(81) 



(231) 



(355) 



(130) 



(25) 



(890) 



II 



76-87 



84-91 



201-224 



353-38o 



I33-I4 8 



25-27 



882-948 





(81) 



(87) 



(209) 



(366) 



(140) 



(26) 



(972) 



III 



76-95 



80-99 



209-228 



372-410 



141-163 



26-29 



934-1017 





(87) 



(92) 



(216) 



(39i) 



(L5o) 



(27) 



(963) 



Coxae : 12-16 (average 13) f.s. on the fore and 24-32 on the middle and hind coxa, and each 

 with 13-20 h.s. ; fore coxa with 2-5 (average 3-8) coxal bristles ; apical seta about § as long as 

 trochanter. Trochanters 28-32 [i wide ; with 6 oval sensilla ; with 9-12 (average 11) f.s. on 

 the fore and 14-18 on the middle and hind trochanter, and each with 8-14 h.s., the latter 

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

 seta which, on the fore trochanter, is 2-2-2-8 (average 2-5) times as long as width of trochanter. 

 Femora of medium width (42-49 pi), ratio width to length of hind femur being 1 : 4-5-4-9 

 (average 4-6) ; each with 26-42 f.s. and 20—37 ns - Tibiae 23-30 y. wide, ratio width to length 

 of hind tibia being 1 : 12-3—16-3 (average 14-2) ; each with 120-150 setae of which 44-64 arc 

 h.s. and 68-92 f.s., the latter about as long as width of tibia ; apical spur about the same size 

 on all tibiae. Tarsi 19-25 a. wide, hind tarsus 6-2-8-6 (average 7) times longer than wide ; 

 each with 8-19 f.s. and 27-37 ns - '• tarsal digitules subequal, about as long as claw. Claws of 

 medium length, somewhat longer than width of tarsus ; slightly curved, with small denticle 

 near tip ; ungual digitules subequal, about as long as claw. 



Abdomen 440-550 (average 491) [x long and 410-530 (average 460) y. wide. 



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

 segmentsII-IIIand by a weak transverse plateonVII ; sternites represented by a weak transverse 

 sclerite on segments II, III and VII. Caudal extension of segment VII large, reaching or 



