142 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Scutum heavily sclerotized antero-laterally, with a median longitudinal narrow membranous 

 area ; scutum 107-128 (n6)|i long, i.e. the ratio lengths of prescutum to scutum 1 : 1-3-1-5 

 (1-4). Prealare, prealar ridge and triangular plate well developed. Scutellum 52-70 (61) a. 

 long and 92-110 (ioi)jj. wide (ratio 1 : 1-6-1-7, av - l '^5> an< 3 the ratio its length to the length 

 of scutum 1 : 1-8-2-1, av. 1-9). A nterior and posterior postalar ridges separated. Mesopleuron : 

 Mesopleural ridge interrupted above the coxal articulation ; mesopleural apophysis, meso- 

 pleural wing process, subepisternal ridge well developed ; basalare stout. Mesepisternum and 

 mesepimeron distinct ; lateropleurite narrow. Mesosternum : Basisternum 143-186 (156) \i 

 long and 177-192 (186) \l wide ; bounded by the marginal and the precoxal ridges. Meso- 

 thoracic spiracle 18-21 (20) jz wide at opening, with a 37-46 (40) u. long supporting bar. Meso- 

 thoracic setae on each side : Prescutal setae 3-5 (4-1) h.s. ; scutal setae 4-6 (4-8) h.s. ; scutellar 

 setae 4-7 (5-1) h.s. Tegular setae 1-2 (1-4) h.s. Postmesostigmatal setae in two groups, 3-7 

 (4-6) f.s. and 1-4 (21) h.s. behind each spiracle, and 3-9 (6-i) f.s. and 1-3 (19) h.s. separated 

 medially. Basisternal setae 9-16 (11-9) h.s. Mesothoracic disc pores : Mesospiracular pores 

 0-1 (0-2). 



Metathorax : Metapostnotal sclerites, metapostnotal ridge and metapleural structures typical 

 of the family. Metathoracic spiracles identical with the mesothoracic. Metathoracic setae on 

 each side : Metatergal setae 1-5 (2-7) f.s. and 2-6 (4-7) h.s. ; metapleural setae 2-8 (4-8) f.s. and 

 1-3 (1-4) h.s. Anterior metasternal setae 3-7 (5-3) f.s. and 2-6 (3-4) h.s. ; posterior metasternal 

 setae (pmss) 0-2 (1-3) f.s. and 1-4 (i-8) h.s. Metathoracic disc pores : Metaspiracular pores 0-2 

 (0-9) ; anterior metasternal pores 0-1 (0-4). 



Wings : 1190-1400 (i274)jx long and 406-532 (448)0. wide ; with 1-4 (2-2) alar setae and 

 2 minute circular sensoria. Hamulohalterae 73-82 (76) jj. long and 15-18 (16) ji wide ; with a 

 49-61 (55) [x long apically hooked seta, i e. the ratio length of seta to the length of hamulohaltera 

 1 : 1-3-1-5 (l'4)- 



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

 of the body 1 : 1-7-2-0 (i-8). Coxa and trochanter about 52 and 241X wide respectively. Femur 

 about 37 (i. wide ; that of fore leg shortest and that of hind leg longest ; the ratio width to 

 length of the hind femur 1 : 5-8-6-4 (6-i). Tibia about 22u. wide, with 2 apical spurs and 

 3-5 smaller spines ; the ratio lengths of femur to tibia of fore leg 1 : 1-0-1-2 (i-i). Tarsus 

 about 2 1 (A wide ; with a pair of apically knobbed tarsal digitules. Claw uniformly tapering 

 to a pointed end ; with a pair of fine ungual digitules. The following table shows the lengths 

 of leg segments (in microns) and the number of setae on each : 







Fore leg 



Middle leg 



Hind leg 





length 



40-46 (44) 



40-46 (44) 



43-49 (45) 



Coxa 



f.s. 



9-12 (10-4) 



9-13 (n-i) 



10-14 ( II- 2) 





h.s. 



7-10 (8-8) 



8-14 (10-2) 



10-15 (12-4) 





length 



61-64 (63) 



61-64 (63) 



64-70 (68) 



Trochanter 



f.s. 



i-5 (2-8) 



2-5 (3-2) 



3-5 (3-9) 





h.s. 



2-4 (3-i) 



2-4 (3-6) 



2-5 (4-i) 





length 



186-211 (198) 



189-217 (204) 



214-235 (226) 



Femur 



f.s. 



13-19 (15-6) 



19-26 (21-7) 



22-31 (25-4) 





h.s. 



14-21 (17-3) 



13-25 (20-6) 



18-31 (26-1) 





length 



198-238 (214) 



229-259 (241) 



284-320 (299) 



Tibia 



f.s. 



20-31 (24-0) 



23-36 (29-4) 



32-43 (377) 





h.s. 



22-35 (26-2) 



22-39 (32-2) 



28-49 (40-3) 





length 



85-92 (88) 



89-95 (92) 



98-107 (104) 



Tarsus 



f.s. 



8-12 (10-4) 



8-12 (io-6) 



9-14 ("7) 





h.s. 



12-17 (147) 



14-19 (15-5) 



14-20 (17-4) 



Claw 



length 



27-34 (3o) 



27-34 (30) 



27-34 (30) 



Total length of leg 



616-680 (637) 



662-711 (683) 



741-808 (769) 



