Dolichopodidae. 179 



5. H. nigripennis Fall, 



1823. Fall. Dipt. Suec. Dol. 15,16 (Dolichopus). — 1824. Meig. Syst. 

 Beschr. IV, 102,52, Tab. XXXV, Fig. 20 (Dolichopus). — 1831. Stann. Isis 

 1831, 253, 42 (Dolichopus). — 1842. Stæg. Krøyer's Tidsskr. IV, 39, 33 

 (Dolichopus). — 1843. Zett. Dipt. Scand. II, 569, 59, et 1855. XII, 4631, 

 59 (Dolichopus). — 1862. Schin. F. A. I, 209 (Gymnopternus). — 1903. 

 Kat. palåarkt. Dipt. II, 312. 



Male. Vertex and frons dull green. Epistoma narrow, greyish 

 white, clypeus bent angularly inwards. Palpi black. Proboscis rather 

 long, when the labella are closed it is about as long as the head is 

 high. Occiput greenish, greyish pruinose; postocular bristles yellow 

 below, black above. Antennæ black, somewhat elongated, longer 

 than the head, third joint longer than broad, with the rounded apex 

 turned dorsally; the arista somewhat short, but with the first joint a 

 little elongated. Thorax dark green, rarely more æneous, slightly 

 pruinose, shining; scutellum only with a few dark hairs at the margin. 

 Pleura green, grey pruinose; propleura with few, somewhat short, 

 pale hairs and a black prothoracic bristle. Abdomen dark green, 

 sometimes more æneous green or æneous, slightly greyish pruinose 

 downwards; it is clothed with short, black hairs, and has short hind- 

 marginal bristles, a little longer on the first segment. Venter greenish, 

 grey pruinose, with pale hairs. Hypopygium short and thick, greenish 

 black, greyish pruinose; eighth segment with black hairs; on the ven- 

 tral side of the hypopygium there are lobes, which are not broad, 

 somewhat triangular, with a pair of hairs; at the end there are two 

 pairs of inner lamellæ, the lateral resembling those in germanus., two- 

 pointed, with the points turned upwards and each point ending in a 

 small spine; the median inner lamellæ are hook-hke, curved down- 

 wards; the outer lamellæ somewhat roundish triangular, the apical 

 margin with a shallow excision; they are blackish brown, lightest at 

 the base, with hairs at the apical margin. Legs black, coxæ greyish; 

 the apex of the anterior femora and the anterior tibiæ yellow oi' 

 brownish, the apex of the niiddle tibiæ more or less darkened; the 

 base of the front tarsi yellow or brown, and the hind tibiæ generally 

 more or less pale brown in the basal part; hind metatarsus shorter 

 than the second joint. The legs have short, black hairs; posterior 

 femora with one preapical bristle; front tibiæ with bristles above, and 

 generally a small postero-ventral bristle; middle tibiæ with two rows 

 of bristles above, and with two antero-ventral and one ventral bristle; 

 hind tibiæ with two dorsal rows of bristles and some antero-ventral 

 bristles, besides with some small postero-ventral bristles. Wings strongly 

 brown or blackish; veins black; discai vein with a very small bend 



12* 



