Dolichopodidae. 185 



The hypopygiimi is, as far as I have have been able to examine, con- 

 structed quite as in cupreus, there are the same long ventral lobes, 

 and inner and outer lamellæ of similar shape. Legs with the coxæ 

 greyish w^ith yellow apex, femora black or blackish, with only the 

 very apex yellow, hind femora almost quite black; tibiæ yellow, hind 

 tibiæ with the apex black; anterior tarsi black, metatarsus yellow 

 with black apex; hind tarsi quite black or only the extreme base 

 pale, the metatarsus considerably shorter than the second joint. The 

 legs have short, black hairs; posterior femora with one preapical 

 bristle ; front tibiæ with a few bristles above, but none below ; middle 

 tibiæ with two dorsal rows of bristles, and one ventral bristle below 

 the middle; hind tibiæ likewise with two dorsal rows and one ventral 

 bristle below the middle, and with some very small bristles upwards. 

 Wings a little brownish tinged; veins brown or blackish brown; discai 

 vein not bent and parallel with the cubital vein ; axillary lobe some- 

 what small. Squamulæ yellow, with a black fringe. Halteres pale 

 yellow. 



Female. Epistoma considerably broader than in the male, grey. 

 Antennæ about as in the male, and for the rest similar to it. 



Length 2,5 — 2,8 mm. 



This species is very similar to and also related to cupreus, but 

 in the male it is easily distinguished by the simple middle tibiæ and 

 the not thickened costa ; in both sexes it is distinguished by the black 

 apex of the hind tibiæ and the black hind tarsi, the parallel cubital 

 and discai veins, and also by the hind tibiæ having only one long 

 ventral bristle; finally it is much smaller. 



H. angustifrons seems to be rare in Denmark; it has only been 

 taken on three occasions; in Ordrup Mose in 1839 (Stæger), and recently 

 in Bøllemosen (the author), and in Ryget Skov at Farum Sø (Kryger, 

 the author), The dates are ^^/s — ^h. We have only seven specirnens, 

 six males and a female, and one male was sent from Stæger to Zetter- 

 stedt; I think it has been overlooked on account of its smallness. It 

 occurs on humid piaces, especially at the border of water on water 

 piants. — The species was originally founded on Danish specimens. 



Geographical distribution : — Northern and middle Europe down 

 into Bohemia; towards the north to middle Sweden, and in Finland. 



10. H. celer Meig. 



1824. Meig. Syst. Beschr. IV, 84, 18 (DoUcJiopus). — 1831. Stann. 

 Isis 1831,262,50 (DoUchopus). — 1842. Stæg. Krøyer's Tidsskr. IV, 42, 37 

 {Dolichopus).~lM3. Zett. Dipt. Scand. II, 582, 71 (DoUchopus). — \S&± 

 Schin. F. A. I, 209. — 1903. Kat. palåarkt. Dipt. II, 317. 



