172 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



III IV V VI VII VIII IX X 



length in u. 



58-61 



27-31 



24-31 



21-27 



24-31 



24-31 



24-31 



40 



(av.) 



(60) 



(29) 



(27) 



(24) 



(27) 



(27) 



(27) 



(40) 



f.s. 



6-10 



2-5 



3-8 



4-8 



3-8 



3-6 



2-5 



2-3 



(av.) 



(77) 



(3-i) 



(6-o) 



(5-8) 



(5-8) 



(3-9) 



(3-3) 



(2-1) 



h.s. 



3-6 



3-5 



3-5 



2-4 



3-7 



3-8 



5-8 



2-5 



(av.) 



(4-8) 



(3-3) 



(4-i) 



(3-2) 



(5-2) 



(5-6) 



(6-1) 



(3-3) 



Set. ca. 



















O-I 



1-2 



2-3 



5-7 



(av.) 0000 (0-2) (1-3) (2-3) (5-6) 



A ntennal bristles well denned ; segments VIII and IX each with one ventral bristle. Terminal 

 segment with 3 slightly longer bristles, the dorsal of which nearer to the apex, and one apical 

 hair-like seta. 



Thorax : 350-403 (388) jx long. Prothorax : Pronotal ridges with the usual weak interruption 

 at the middle ; lateral pronotal sclerite and post-tergites small. Proepisternum without any 

 ridge-like sclerotization. Prosternum triangular, 18-31 (24)0. long ; prosternal ridge with a 

 small crescent-like antero-median extension, 67-79 (73)^ long. Prothoracic setae : Medial, 

 lateral pronotal, post-tergital and antespiracular dorsal setae absent. One antespiracular ventral 

 seta may be present (av. 0-4), and one prosternal seta always present on each side of the median 

 line. 



Mesothorax : Prescutum 49-58 (55) [x long and 70-89 (85)0. wide, the ratio being 1 : 1-4-1-7 

 (i-6) ; prescutal ridge well developed and prescntal suture distinct. Scutum 46-52 (49) u. long, 

 i.e. the ratio lengths of prescutum to scutum 1 -0-1-3 (i-i) : 1. Prealare, prealar ridge, tegula, 

 anterior and posterior notal wing processes well developed. Scutellum 31-34 (33) |x long and 

 73-82 (79) [x wide, i.e. the ratio 1 : 2-3-2-7 (2-4), and its length to the length of the scutum 

 1 : 1-4-1-6 (1-5) ; scutellar ridge distinct. Postalare with the anterior and posterior postalar 

 ridges joined. Mesopleuron : Mesopleural ridge continuous above the coxal articulation ; 

 mesopleural apophysis, mesopleural wing process and subepisternal ridge well developed ; basalare 

 slender. Mesepisternum and mesepimeron w-ell defined ; lateropleurite comparatively large. 

 Mesosternum : Basisternum 85-98 (92) [x long and 134-159 (150) jx wide ; bounded by the 

 marginal and the precoxal ridges. Furca well developed. Mesothoracic spiracle 12-15 (14)1/ 

 wide at opening, with a 27-31 (29) jx long supporting bar. Mesothoracic setae on each side : 

 Prescutal setae 1-2 (1-5) ; scutal setae 2-3 (2-2) ; scutellar seta always one. Tegular setae 2-3 

 (2-6). Each lateropleurite always with a small later opleurital seta. Postmesostigmatal and 

 basisternal setae absent. Metathorax : Metapostnotal sclerite small ; metapostnotal ridge 

 absent. Metapleural ridge attenuated towards the small metapleural apophysis. Metepisternum 

 and metepimeron distinct. Precoxal ridge and metasternal apophysis well developed. Meta- 

 thoracic spiracles similar to the mesothoracic. Metathoracic setae on each side : Metatergal 

 setae 1-2 (1-7) ; metapleural setae absent ; one anterior metasternal seta always present, and 

 posterior metasternal setae absent. 



Wings : 714-798 (756) jx long and 266-308 (280) (x wide ; with one alar seta. Hamulohalterae 

 49-58 (52) |x long and 15-18 (17) (x wide ; with one apically hooked, 49-67 (61) jx long seta, i.e. 

 the ratio lengths of seta to hamulohaltera 1 : 0-9-1-1 (10). 



Legs : Comparatively short and stout ; the fore and middle legs of subequal length and 

 shorter than the hind leg ; the ratio length of the hind leg to the total body length 1 : 21— 2-4 

 (2-3). Coxa and trochanter about 37 and 21 [x wide respectively. Femur about 31 [x wide ; 

 that of the middle leg shortest, and those of the fore and hind legs subequal ; the ratio width 

 to length of the hind femur 1 : 3-4-3-8 (3-6). Tibia about 18 a. wide ; with 2 apical spurs and 

 2-3 smaller spines ; in the fore leg the femur shorter than the tibia, the ratio their lengths 

 being 1 : 1-1-1-3 (1-2). Tarsus about i5jx wide ; tarsal digitules apically knobbed, about 

 27(x long. Claw broad at base and abruptly tapering towards a pointed tip ; ungual digitules 



