SElllCOMYlA. 293 



blackish ; I'i-oils, at level ot" antenna), }j widtli of head, narrow iuy 

 consiilerably at vertex ; upper halt" barely sliiniug, black ; ocelli 

 distinct, red, set on the surface of the Irons, enclosed by a 

 slightly impressed line; lower half of frons with brownish-yellow 

 dust. The whole frons with long soft black hairs, wliich towards 

 and on the vertex become dark brown. Whole underside of head, 

 and face from level of the antennte, yellovvish-pollinose, the central 

 binnpdark brown (a little lighter in the centre), with a fairly wide 

 black stripe on each side of it. 8ome black hairs towards sides of 

 central bump, and a little short bright yellow hair on the other parts 

 of under side of head, including the two black stripes. Antenna) 

 without any protuberance ; a small shining rich mahogany-brown 

 triangle immediately above and contiguous to their roots. 1st 

 antennal joint shining black, 2nd nearly quadrate, viewed from in 

 front, with a few stiti' black hairs, 3rd joint much wider than 2nd, 

 twice as long, quite bare, dark reddish-brown, oval, with a little 

 whitish dust on underside; arista long, yellow, plumose above and 

 below, the upper rays distinctly the longer. Occiput ash-grey, 

 nearly whitish on margins, which on upper half of head do not 

 project bey^ond the margin of the eyes themselves, but which do so 

 on the lower half, where they bear long w bite hair. Thorax dull 

 brownish, barely shining, and with sides brownish-grey ; the 

 whole rather thickly covered with yellowish- brown hair. Scutel- 

 luiu brownish-yellow, paler on hind margin; dorsum with browu 

 hairs at base which become yellow and longer towards the tip ; 

 under side with a fringe of soft whitish-yellow hairs. Abdomen : 

 1st segment whitish-yellow, remainder blackish ; 2nd yellowish 

 on anterior corners, 2nd, 3rd and 4th with an uninterrupted 

 rather narrow yellowish band just before the middle and reaching 

 the lateral margins or nearly so ; all the bands of the same width ; 

 5th segment entirely black ; some long, soft yellow hairs at tlie 

 sides at the base. Surface of abdomen with very short pubescence 

 concolorous witli the ground-colour; a fringe of very short yellow 

 hairs on hind margin of each segment, most conspicuous on the 

 4th segment, and the extrc'me edges of the segments themselves, 

 brownish-yellow. Genitalia consisting of a short cylindi-ical tube, 

 from which emerge two oval brownish-yellow lamelhe. f.c^/s : 

 coxie black. Fore femora black, with a yellow streak on hinder 

 side, middle femora yellow, with a wide black streak on front side, 

 hind femora with basal half i)rownish-yellow and apical half 

 black; all the femora with a little pale yellow hair; the hind 

 femora with a number of stiff black bristles of dilferent lengths 

 below, on apical half. Tibia; mainly black, fore pair at base, and 

 middle ])air at base and tip, yellowish ; hind tibiic black ; all tibia) 

 with close pubescence, wliich is brownish-yellow on the front side 

 of the fore tibiie, and whitish on the hinder side, where it is much 

 longer ; hind tibiic with very short pubescence which is black in 

 front and w hiti>h on hinder sidi'. Tarsi black or dark brown, 

 with short tj;olden-yellow pubescence; hind pair with rich 

 golden-brown pubescence below. Win'js pale grey ; a small 



