Dolichopodidae. 401 



has no hairs, the second small bristles, the third and the arista are 

 hairy. The palpi are larger in the female than in the male. Thorax 

 has no acrostichal bristles; in my specimen there are five dorso- 

 central bristles, but alternating with them some small hairs. Scutellum 

 bare, with two strong marginal bristles, and at each side a small 

 hair. Propleura with a few hairs below, among which one a little 

 stronger. Abdomen somewhat short; the hypopygium free (Mik), with^ 

 out bristles on the eighth segment; the outer lamellæ small, elongated 

 oval, hairy. Abdomen in the female with five visible segments. There 

 are dot-like impressions at the side margins of the second, third and 

 fourth segments. The abdominal segments, except the first, have no 

 distinct hindmarginal bristles. Legs somewhat short, the hindrneta- 

 tarsi very short, about a quarter of the length of the second joint, in 

 the female scarcely half as long as the second joint. The legs have 

 very few bristles, femora without preapical or other bristles; front 

 tibiæ without bristles, middle tibiæ with two antero-dorsal and one 

 postero-dorsal bristle. Wings of usual shape; the mediastinal vein 

 terminating in • the subcostal vein; the discai vein straight, quite 

 parallel with the cubital vein; posterior cross-vein placed behind the 

 middle, the last part of the postical vein only a little longer than the 

 cross-vein; anal vein not reaching the margin. Axillary lobe moder- 

 ately developed. The discai vein has no convexity. Squamulæ small, 

 with a small angulary lobe, bearing a long fringe, and with shortcr 

 hairs on the inner part of the squamulæ. 



The genus only contains one species, also occurring in Denmark. 



1. A. niger Loew. 



1869. Loew, Beschr. eur. Dipt. I, 198,177 (Chrysotus). — 1874. Kow. 

 Verhandl. zool. bot. Gesell. Wien, XXIV, 476 (Chrijsotus). — 1878. Mik, Dipt. 

 Unters. Jahresber. k. k. akad. Gymn. Wien, 6, Taf. I, Flg. 6 — 9. — 1903. 

 Kat. palåarkt. Dipt. II, 320. 



Of this species I have only examined the female which I there- 

 fore describe, and I then add the special male characters, taken from 

 Loew's description. 



Vertex and frons black, shining. Epistoma somewhat broad, 

 black, below a little prominent, and here bearing some distinct 

 bristles. Palpi somewhat large, blackish grey. Occiput black, a little 

 greyish pruinose; postocular bristles black. Antennæ black, short, the 

 third joint roundish. Thorax black, somewhat brownish pruinose, but 

 shining. Pleura dark grey pruinose. Abdomen black, somewhat 

 pruinose, slightly shining; it is clothed with short, black hairs, almost 



2G 



