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MORPHOLOGY AND TAXONOMY OF ADULT MALES 



2-2 (2-17). Anterior and posterior postalar ridges well separated. Mesopleuron : Mesopleural 

 ridge interrupted above the coxal articulation ; mesopleural apophysis and pleural wing process 

 well developed ; basalare strong. Subepisternal ridge, mesepisternum, mesepimeron and latero- 

 pleurite typical of the family. Mesosternum : Basisternum 131-156 (143)11 long and 168-198 

 (177)1* wide ! marginal and precoxal ridges well developed. Mesothoracic spiracle 18-21 (20)0. wide 

 at opening, with a 34-40 (37)11 long supporting bar. Mesothoracic setae on each side : Prescutal 

 setae 5-7 (6-o) h.s. ; scutal setae usually in two groups, the anterior including 3-5 (3-3) h.s. and 

 the posterior with 4-5 (4-3) slightly longer setae ; scutellar setae 2-3 (2-7) h.s. Tegular setae 

 3 — 4 (3'3) ns - '• postmesostigmatal setae 13-19 (16-8) f.s. and 1-4 (2-8) h.s. forming on both sides 

 a transverse band. Basisternal setae 10-13 ( II- 5) ns - Mesothoracic disc pores : Mesospiracular 

 pores 0-1 (0-5) behind each spiracle ; one postmesostigmatal pore always present medially. 



Metathorax : Metapostnotal sclerites and metapostnotal ridge well developed ; pleural ridge, 

 pleural wing process, mesepisternum and mesepimeron well developed. Precoxal ridge and 

 metasternal apophysis strong. Metathoracic spiracle identical with the mesothoracic. Meta- 

 thoracic setae on each side : Metatergal setae 2-5 (3-8) f.s. and 3-4 (3-7) h.s. ; metapleural setae 

 8-10 (8-8) f.s. and 0-2 (0-5) h.s. ; postmetastigmatal setae 3-4 (3-5) f.s. Anterior metasternal 

 setae 7-12 (9-3) f.s. and 2-3 (2-6) h.s. ; posterior metasternal setae 0-1 (o-8) f.s. and 0-1 (0-5) 

 h.s. Metathoracic disc pores : Metaspiracular pores absent ; anterior and posterior metasternal 

 pores 0-1 (o-8) and 0-1 (0-5) on each side, respectively. 



Wings : 882-1022 (938) (x long and width 350-420 (378) (i wide ; with 3-4 (3-2) alar setae 

 and a compact row of 3-4 (3-2) minute circular sensoria. Hamulohalterae 67-82 (76)11 long 

 and 15-18 (i7)u. wide ; with one, 43-49 (46) apically hooked seta, i.e. the ratio lengths of the 

 seta to the hamulohaltera 1 : 1-4-1-8 (1-7). 



Legs : Moderately long ; the ratio length of the hind leg to the total length of the body 

 1 : 2-0-2-1 (2-02). Coxa and trochanter about 48 and 24(1 wide respectively. Femur about 

 400. wide ; that of the fore leg usually shortest but sometimes equal to that of the middle leg ; 

 the ratio width to length of the hind femur about 1 : 47. Tibia about 24^ wide ; with 2 

 apical stout spurs and 4-6 smaller spines ; the ratio lengths of femur to tibia of the fore leg 

 1 : i-i-i (1-03). Tarsus about 2ifi wide ; with a pair of apically knobbed tarsal digitules. 

 Claw gradually tapering to a pointed end ; with a pair of finely pointed ungual digitules. The 

 lengths of the leg segments (in microns) and the number of setae on each are given in the 

 following table : 







Fore leg 



Middle leg 



Hind leg 





length 



40-46 (43) 



40-46 (43) 



43-49 (4 6 ) 



Coxa 



f.s. 



8-16 (12-0) 



9-15 ("-3) 



10-17 (i3-o) 





h.s. 



6-10 (7-8) 



7-10 (8-3) 



7-9 (8-3) 





length 



58-61 (59) 



58-61 (59) 



61-67 (64) 



Trochanter 



f.s. 



4-5 (4-3) 



4-5 (4-3) 



4-5 (4-8) 





h.s. 



4-6 (5-0) 



4-7 (5-3) 



4-6 (4-8) 





length 



168-183 (174) 



171-186 (177) 



177-195 (186) 



Femur 



f.s. 



29-34 (3i-o) 



28-35 (32-o) 



36-48 (40-0) 





h.s. 



8-13 (100) 



8-12 (9-3) 



7-14 (9-8) 





length 



183-192 (189) 



195-207 (201) 



229-244 (238) 



Tibia 



f.s. 



33-43 (39-o) 



38-46 (41 -8) 



48-60 (53 0) 





h.s. 



6-8 (7-0) 



6-10 (8-3) 



8-10 (9-0) 





length 



73-79 (76) 



73-79 (76) 



76-82 (79) 



Tarsus 



f.s. 



10-16 (140) 



10-16 (13-3) 



12-18 (15-0) 





h.s. 



8-12 (9-8) 



8-13 (10-5) 



8-14 (n-3) 



Claw 



length 



24-30 (27) 



24-30 (27) 



24-30 (27) 



Total length 



of leg 



558-577 (567) 



567-595 (583) 



628-656 (644) 



