34 Oi'thorrapha brachycera. 



— 1842. Zett. Dipt. Scand. I, 179, 4 {Dasypogon). — 1857. Low. Linn. 

 Entom. II, 493,28 {Isopogon). — 1862. Schin. F. A. I, 131 {Isopogon). — 

 1903. Kat. palaarkt. Dipt. II, 113. 



Fig. 17. Wing of L. brevirostris. 



Male. Face distinctly arched, only slighlly greyish just at the eye- 

 niargins; epistomal beard varying in colour from black with whitish 

 ends of the hairs to quite whitish. Proboscis and palpi black. Frons 

 and vertex black with brownish hairs. Occiput grey with whitish hairs. 

 Antennæ black. Thorax black, somewhat shining, coarsely punctate; 

 two narrow median lines glabrous. The disc clothed with long hairs 

 which are black or brownish in front, paler to whitish backwards. 

 Scutellum with white hairs. Pleura black, somewhat greyish pruinose; 

 they are more distinctly hairy on a spot below the humerus, on the 

 hind part of the mesopleura, on the pteropleura, the upper part of 

 the sternopleura and on the hypopleura; there are long, white hairs 

 on the metapleura and on the middle of the mesopleura. Abdomen 

 black, coarsely punctate, clothed with somewhat short, depressed, 

 silver-white pubescence; along the sides the hairs are longer and 

 hang downwards like a fringe. Venter black, shining, with long, 

 white hairs; on the last two segments there is a tuft of brownish to 

 blackish hairs. — All the long hairs on the body are woolly, giving 

 to the fly a somewhat woolly appearance. — Legs black; coxæ slightly 

 pruinose, on the outer side with long, whitish hairs; tibiæ ferrugineous 

 on the basal half, the front tibiæ to a less extent and often quite 

 black. The hind tibiæ distinctly thickened from just below the base 

 to the apex; the hind metatarsi as long as the tibiæ and sharply 

 compressed with a short fringe on each margin (Fig. 16). The femora 

 clothed with short, blackish hairs above, and with long, whitish hairs 

 on the posterior side and below; the hairs on the tibiæ are for the 

 most part whitish, the dense pubescence on the ventral side of the 

 hind tibiæ is yellowish to white; there are some long, thin, white 

 hairs, especially on the middle tibiæ. The somewhat stronger bristles 

 are chiefly black but may be reddish on the ferrugineous parts of 

 the legs. Wings slightly brownish at base and apex but hyaline in 

 the middle; the fumigation is chiefly caused by broad seams at the 

 veins; the veins are brown. Halteres yellow. 



