Dolichopodidae. 



295 



grey pruinose, with yellow hairs. Hypopygium blackish; the ventral 

 lobes short, flat, a little dilated at the apex and here with dense 

 hairs, and at the upper corner with a long, pale, curved hair (formed 

 of coalesced hairs); the oater laniellæ short, elongated triangular, 

 blackish, hairy at the margin. Legs yellow, posterior coxæ grey with 

 the apieal part yellow, often more than the apical halt; the legs for 

 the rest either quite yellow, the anterior tarsi darkened towards the 

 end, the hind tibiæ yellowish brown, and the hind tarsi brown or 

 blackish brown, or, in the darker varieties, the front femora are 

 darkened above, the hind femora blackish above and at the apex, 

 the anterior tarsi with the apex of metatarsus and the four following 

 joints black, hind tibiæ and tarsi quite black or blackish brown. The 

 middle coxæ have a small, yellowish apical spine; the front meta- 

 tarsus is as long as the three following joints, slightly thickened at 

 the apex below; hind metatarsus somewhat shorter than the second 

 joint. The legs have short, black hairs, coxæ pale-haired; the front 

 coxæ have about two, the middle coxæ one or two and the hind 

 coxæ one black bristle: middle femora with one or a pair of small 

 preapical bristles on each side, hind femora without preapical bristle; 



Fig. 92. Wing of X. caliginosurn d- 



front tibiæ with a bristle above near the base, and sometimes with 

 one or two smaller farther downwards; posterior tibiæ with about 

 two antero- and two postero-dorsal bristles. Wings brown or blackish 

 brown tinged; veins black, discai vein slightly curved. Squamulæ yel- 

 low, with a yellow fringe. Halteres pale yellow. 



Fig. 93. Antenna of X caliginosurn 9- X 60. 



Female. Epistoma broad, whitish grey. Palpi large, grey, a little 

 pale at the apex. Antennæ short, third joint triangular, arista about 



