284 MEDICAL ENTOMOLOGY 



52. Frontal callus square- Small black species with white haired 



median abdominal spots, Legs blackish, tibiae yellowish . leucopogon. 



(India; Sikhim.) 

 Frontal callus pear-shaped. Large reddish brown species, 



abdomen with median triangular spots. Legs reddish brown discrepans. 



(Ceylon.) 



Group IX. 



53. First posterior cell closed 54 



First posterior cell not closed . . . . . . . . .55 



54. Large blackish species with narrow fulvous bands on abdomen servillei. 



(Java.) 



55. Abdomen blackish brown, the first two segments covered with 



grey tomentum (Male) . crassus. 



(Canara, India ; Java.) 



56. Forehead narrow, seven or eight times as long as it is broad, 



frontal callus narrow with a lineal extension. Black or 



brown species ............ 57 



Forehead broader, four or five times as long as it is broad, 

 frontal callus large with a stout, broad, or spindle-shaped 

 extension ........ ..... 62 



57. Large black or brown species 21 mm. in length, with very 



narrow pale bands on abdomen . . . . . . . . .58 



Smaller blackish species, 15 to 17 mm. in length, with 



whitish bands on abdomen 59 



58. Brown species. Scutellum and sides of thorax with pale to- 



mentum. Legs blackish, tibiae obscurely reddish . . alboscutatus. 



(India.) 

 Black species. Scutellum and sides with no such pale 



tomentum. Legs black, tibiae yellowish white . . . explicatus. 



(Sikhim ; Assam ; India.) 



59. Forehead narrower anteriorly. ......... 60 



Forehead hardly narrower anteriorly, but parallel . . . . . 61 



60. Frontal callus large, reaching the eyes. Antenna, legs, and 



palpi wholly black. Wings clear or tinged smoky brown . nicobarensis. 



(Nicobar Islands.) 

 Frontal callus narrow. Antennae and legs blackish. Palpi 



yellow. Wings brownish ....... justorius. 



(Borneo.) 



61. Frontal callus narrow, not reaching eyes. Antennae and legs 



black. Palpi black, paler on insides. Wings faintly tinged 



brown khasiensis. 



(Assam, Meerut, India.) 



62. Brown or black species with whitish bands and spots on abdo- 



men .............. 63 



Reddish yellow species with whitish bands and spots on abdo- 

 men 64 



.63. Abdomen reddish brown or blackish brown with broad white 

 bands and large triangular median spots. Palpi short and 



stout . . sanguineus. 



(Bengal ; Assam ; Malay Peninsula ; Java ; China.) 



