Dolichopodidae. 43 



white. Palpi white. Occiput grey; postocular bristles yellow, rarely 

 the upperinost black. Antennæ yellow, arista brown. Thorax yellow, 

 slightly greyish pruinose, dull. Scutellum yellow, with two black 

 marginal bristles, and on each side a small hair; postscutellum more 

 or less blackish. Pleura yellow, greyish white pruinose, more or less 

 blackish grey below the wing-root, on the front part at the lower 

 margin and above the posterior coxæ ; propleura with about two pale 

 bristles. Abdomen yellow, somewhat shining; the sixth and seventh 

 segments short, more or less visible; the fifth segment black, only 

 yellow just above; the fourth segment has the sides prolonged down- 

 wards anteriorly, so that it is broad here, the side margins are 

 sloping upwards behind, the segment thus narrowed backwards; the 

 fifth segment is likewise prolonged down on the sides; the fifth ven- 

 tral segment is black and prolonged forwards or downwards as two 

 black ventral teeth. Abdomen clothed with black hairs, the fourth 

 and fifth segment have longer, yellow, erect hairs at the sides, the 

 fifth also above. There are long, black hindmarginal bristles on the 

 first segment, short on the second, and very short or almost wanting 

 on the third and fourth. Venter yellow, with pale hairs, the third 

 segment black towards the hind margin, and here with long hairs. 

 Hypopygium large, strongly compressed towards the base; it is black 

 and shining; the eighth segment with yellowish hairs; there are small, 

 pointed, middle and posterior ventral lobes; the inner lamellæ hidden; 

 the outer lamellæ are small, white, lying dorsally. Legs pale yellow, 

 the tarsi not or imperceptibly darkened at the apex; the fourth joint 

 on the front tarsi is a little dilated towards the apex below, and with 

 the hairs a little tuft-like, the apical part suddenly excised; the front 

 metatarsus about as long as the three following joints, the middle 

 metatarsus longer than the four following joints, and the hind meta- 

 tarsus about as long as the second joint. The front coxæ pale-haired, 

 with some yellow and black bristles at the apex, the middle coxæ 

 black-haired, with a flat, yellow spine at the apex, formed of coalesced 

 hairs; the hind coxæ with a strong, black bristle. The legs have 

 short, black hairs, the anterior femora bare below or with impercep- 

 tible, pale hairs; middle femora with some black hairs below at the 

 base, and behind them three to four black, flat, squamular hairs; 

 front tibiæ with a pair of small bristles above near the base, posterior 

 tibiæ with bristles on the dorsal and anterior sides, and with apical 

 bristles; the posterior metatarsi with some bristles on the sides and 

 below. Wings yellowish tinged; veins brown, discai vein with a not 

 large bend, the first posterior cell broadly open; axillary lobe small. 

 Squamulæ pale, with a yellow fringe. Halteres yellow. 



