Dolichopodidae. 357 



but besides the lower half of the occiput is covered, but not densely, 

 with somewhat bristly hairs, also present above the oral aperture. 

 The antennæ are inserted near to each other, above the middle; 

 they are short, the first joint cylindrical or somewhat obconical, the 

 second short and simple, the third sometimes a little elongated in the 

 male, triangular or elongated triangular, more or less pointed; the 

 arista is dorsal, inserted near the base of the joint, it is longer than 

 the antennæ, its first joint not quite short. The first antennal joint 

 is bare, the second has bristles at the apex, the third is distinctly 

 hairy, and the arista short-pubescent. Epistoma very narrowed above, 

 generally slightly broader in the female; it is widened downv^ards; 

 the clypeus is only indistinctly separated by a little notch at each 

 side, it does not reach the lower margin of the eyes, except, according 

 to Mik (Jahresb. k. k, Akad. Gymn. Wien, 1878, 8), in the male of 

 marginatus. Proboscis not or almost not protruding; it and the oral 

 aperture are of the same size in both sexes. Labrum (scambus) high, 

 with a somewhat chitinised, long median tooth with the apex eurved 

 downwards, and with a strong and more chitinised lateral tooth on 

 each side below about at the base; behind, the labrum has a strong, 

 upwards directed process; hypopharynx strong, triangular, somewhat 

 broad at the base, with the ouler apex eurved a little downwards; 

 it is slightly longer than labrum. The maxillary palpi are squamiform, 

 almost roundish, with bristles at the margin. Labium with the basal 

 part longer than the labella, roundly excised behind so that it goes 

 out into two processes; the labella are short and broad. Thorax 

 rectangular, somewhat high, and distinctly arched above; postscutellum 

 rather large with two impressed lines, converging behind; pro- and 

 metathorax small, the former with small bristles above; propleura 

 with fine hairs and one prothoracic bristle. The acrostichal bristles 

 are short, uniserial, or a little irregularly biserial behind; there are 

 five dorsocentral bristles, increasing in length backwards, the first 

 is small, and sometimes so small as to be almost wanting, and this 

 may be different in various specimens of the same species; further 

 there is a humeral bristle, and one or two weak, a posthumeral, two 

 notopleural, a præsutural quite in front, three supraalar and a post- 

 alar bristle; there are only very few hairs on the front part of the 

 disc. Scutellum is bare, it has two marginal bristles, besides there is 

 a small hair on each side, and four hairs between the bristles; 

 according to Mik 1. c. umbripennis forms an exception, but these hairs 

 are on the whole not constant in number, in scambus I find often, 

 almost generally, six or live, and in curvipes sometimes only three. 

 Abdomen short and more or less flattened; in the male there 



