Dolichopodidae. 307 



Male. Vertex and frons blackish grey. Epistoma narrow, whitish. 

 Palpi pale yellow. Occiput blackish grey; postocular bristles black, 

 quite below a little paler; the bristles on vertex blackish. Antennæ 

 about as long as the head, brownish black, yellow at the base and 

 below. Thorax yellow or ferruginous, the bristles black. Pleura like- 

 wise yellow, below the wing root a black spot; propleura with a 

 black bristle. Abdomen blackish or blackish brown, clothed with 

 short, blackish hairs, and with hindmarginal bristles, which are a 

 little longer on the tirst segment. Venter yellow, with pale hairs. 

 Hypopygium with some longish hairs at the end; of appendages I 

 could only see the outer lamellæ, which are somewhat long, pale 

 yellow, narrow and lancet-shaped, with longish hairs. Legs yellow, tarsi 

 with the last joint blackish; hind metatarsus somewhat shorter than the 

 second joint. The legs have short, blackish hairs; the anterior coxæ 

 with blackish or brown bristles or bristly hairs anteriorly, hind coxæ 

 with a bristle on the outer side; front femora with a httle longer 

 hairs below, and here with a bristle near the base; posterior femora 



Fig. 97. Wing- of A. ftavicolUs 9. 



with a preapical bristle; front tibiæ with a small bristle above near 

 the base; middle tibiæ with two antero-dorsal bristles, and with one 

 postero-dorsal near the base; hind tibiæ with dorsal rows of bristles. 

 Wings slightly yellowish tinged; veins brown or pale brown; discai 

 and cubital veins almost parallel, slightly diverging outwards. Squamulæ 

 yellow, with a blackish or brown fringe. Halteres yellow. 



Female. Epistoma very slightly broader, and the antennæ only 

 slightly shorter than in the male; the spot on the pleura more 

 brownish. No bristle below at the base of the front femora; for the 

 rest quite similar to the male. 



Length 2 — 2,2 mm. 



A. fiavicollis is, as the preceding species, rare in Denmark, we 

 have only three specimens, all females; two taken on a sandy field 



20* 



