Empididae. 



179 



a posthumeral, three notopleural, a supraalar and a postalar bristle, 

 all somewhat long, black; besides there are some other hairs on the 

 sides of the disc. Pleura dark grey. Scutellum with four strong, 

 black marginal bristles. Abdomen dull black, densely clothed with 

 black hairs, and with long marginal bristles on the segments. Venter 

 similarly coloured, short-haired. Exterior genitalia small, only slightly 

 compressed, the lamellæ a little shining. On the sides at the hind 

 margin of the eighth ventral segment there are long, erect, fan-like 

 spread hairs. Legs black or blackish; coxæ grey pruinose; on the 

 front legs the coxæ, femora and the base of the tibiæ yellowish, and 

 likewise, but to a slighter degree on the middle legs; 

 also the hind legs with the base of the femora light, 

 and with yellow knees. Front femora with somewhat 

 long hairs on the postero-dorsal side; middle femora 

 with strong bristles on the anterior side; hind femora 

 with longish hairs above and below, longest below; front 

 tibiæ with short hairs and some bristles above; middle 

 tibiæ short-haired; hind tibiæ with bristles on the dorsal 

 and anterior side. Front tibiæ a little thickened towards 

 the apex, metatarsi somewhat thicker, a little compressed, 

 with a little longer hairs on the dorsal side and a pair 

 of bristles at the apex; they are about two thirds of 

 the tibiæ in length, and as long as the three foUowing 

 joints; the middle metatarsi have a little dilatation at 

 the base on the posterior side, beset with a little longer 

 hairs. All tarsal joints longer than broad. Wings some- 

 what dark tinged. Veins blackish; the upper branch of 

 the cubital vein originating about rectangularly , only 

 slightly diverging, and slightly curved at the apex; anal 

 vein distinct, brownish, not reaching the margin. Stigma 

 blackish brown. Halteres black. 

 Female unknown. 

 Length 2,7—3 mm. 



This species is easily recognised, especially by the 

 erect hairs at the end of abdomen and by the, to be 

 sure small, but however very characteristic dilatation at 

 the base of the middle metatarsi, a shape, which I have 

 seen in no other Hilara. In immature specimens the 

 legs may be lighter. 

 H. lasiopt/(/a seems to be rare, only four specimens have been 

 taken, two in 1883 and two in 1908; Vejle Nørreskov (the author) 



12* 



Fig. 68. 



H. lasiopyga, 



front leg. 



X 30. 



Fig. 69. 

 H. lasiopyga, 



middle 



metatarsus. 



X35. 



