244 Orthorrliapha brachycera. 



— 1862. Schin.F. Å. I, 87. — 1903. Stein, Wien. ent. Zeitg. XXII, 225. 



— 1903. Kat. palaarkt. Dipt. II, 270. 



Male. Frons and vertex velvet black, just above the antennæ a 

 brownish, triangular point. Palpi yellow. Occiput grey, with black 

 bristles above and paler hairs below. Antennæ black or brownish 

 black. Thorax shining, blackish, but somewhat brownish grey pruinose, 

 and hence a little duUish. Dorsocentral bristles long, black. Further 

 a humeral bristle, a posthumeral, two notopleural, a supraalar and a 

 postalar bristle, all black; besides there is a bristle inwards to the 

 humeri. Scutellum with two black marginal bristles. Pleura brownish 

 grey pruinose, generally somewhat reddish below the wing-root. Ab- 

 domen black or slightly brownish, greyish pruinose and therefore 

 somewhat dull, sparingly clothed with short, brownish hairs. Venter 

 of the same colour. Legs yellow, the posterior tibiæ brown, some- 

 times the base lighter, front tibiæ only slightly or not at all browned; 

 tarsi brown or black; the middle tarsi are very curious, the third 

 joint is excised below, and has at the apex a tooth, which is directed 

 inwards, somewhat dilated at the apex and here with two hairs; at 

 the base the joint has two bristles. Front femora slightly thickened 

 with bristly hairs below on the basal part, some of which are long; 

 the posterior femora short-haired, with a single, long bristle near the 

 apex on the anterior side, sometimes also one or two weaker; the 

 middle femora with some short, bristly hairs below at the base, and 

 the hind femora with a little longish hairs above at the base; front 

 and hind femora with a short, dense, whitish pubescence on the ven- 

 tral side; the front tibiæ with a row of dense, short, erect hairs 

 below, and a few bristly hairs above on the basal part; middle tibiæ 

 short-haired, with a pair of long bristles on the antero- and postero- 

 ventral side; hind tibiæ with bristly hairs above and below, and with 

 a couple of long bristles on the anterior and on the ventral side; the 

 number of the long bristles is not quite constant, generally greatest 

 in the female. The hairs on the legs are brownish, the bristles blackish 

 to black. Wings yellowish or slightly brownish tinged. Veins brown. 

 Stigma very faint. Balteres whitish yellow. 



Female. Similar to the male; the middle tarsi simple; the short, 

 whitish pubescence also present below the middle femora. The ovi- 

 positor, i. e. the seventh abdominal segment, is densely haired with 

 slightly longish, reddish brown hairs, which are strongest and densest 

 at the hind margin of the dorsal segment. The wings more brownish 

 than in the male. 



Length 5—5,7 mm. 



Stein (1. c.) says, that all femora in the male have the short, 



