BOM13YHUS. 269 



and an elongate patch of very long snow-white scales running 

 somewhat diagonally across each side from eye-inargin nearly to 

 centre of face ; antennae black, 1st joint with long bristly pubes- 

 cence ; mouth-opening hxrge, grey, with some short pale hairs on 

 margin; proboscis blaclv, as long as abdomen; occiput black, some 

 small snow-white scales on eye-margins ; vertex witli a bunch of 

 long black hairs. Thorax velvet-black, with a thick collar on 

 anterior margin of elongate yellowish scales ; rest of dorsum with 

 very dense dark brown pubescence of moderate length, some 

 whitish pubescence along hinder margin. Scutellnm covered with 

 very small scales, which appear bright emerald-green or pale violet 

 according to the dii-ection of the light. A tuft of long snow- 

 white scales behind wing-base. Abdomen black, with (apparently) 

 long dark brown bristly pubescence on dorsum towards and on 

 sides, where it becomes much longer, thicker, and almost scaly ; 

 a small tuft of snow-white scales towai'ds sides at base of 2nd 

 segment; 4th segment with a bunch of very long snow-white 

 scales towards each side at base, and a smaller bunch in centre on 

 hind margins of 4th, 5th, and 6tli segments. V^enter black, with 

 rather long soft whitish hairs in the centre and (apparently) some- 

 small snow-white scales ; rather bare towards sides, but the very 

 long pubescence of the dorsum and actual sides of the abdomen 

 curve nnder the venter to some extent. Legs dark brown or 

 black; coxae with yellowish-grey hairs; femora and tibiae witli 

 numerous small glistening snow-white scales; soft hairs below 

 anterior femora ; hind femora and posterior tibiae with spiny 

 bristles. Wings quite clear, costal and subcostal cells yellowish ; 

 halteres black ; squamae yellowish, with short white fringe; veinlet 

 closing 1st; posterior cell in a straight line with discal cross-vein. 

 2 . Head as broad as thorax ; frons dark olive-brown, distinctly 

 but not greatly narrower at vertex than at level of antennae, where 

 it forms one-third the width of the head, apparentl)^ covered in 

 good specimens with small snow-white scales ; face with long 

 brilliantly snow-white scales ; 1st antennal joint with rather long 

 black pubescence, softer than in c? ; two oval callus-like elevations 

 on frons, contiguous to eyes and vertical triangle ; occiput more 

 thickly covered with longer snow-white scales than in (^ ; ocelli 

 bright red. Dorsum of thorax covered with very small, brilliantly 

 shining, emerald-green depressed scales with violet reflections ; a 

 patch of small snow-white scales behind the humerus and below 

 the wing-root ; two or three such patches of scales on pleurae ; 

 with rather long yellowish pubescence intermixed ; dark brown 

 pubescence of dorsum sparse ; scutellum covered with small 

 emerald-green scales with violet reflections and some rather long 

 black pubescence. Abdomen black, whole surface closelj^ covered 

 with very small brilliantly shining violet scales, showing a bronze 

 tint in certain lights, also a row of stiff black hairs towards hind 

 bolder of each segment. In all else as in J • 

 Length, S 7-8 ; $ 5 mm. 



