]60 Orthorrhapha brachycera. 



long hairs at the ventral margin. Legs long and slender, hind meta- 

 tarsus a little shorter than the second joint; coxæ grey or brownish; 

 anterior femora yellow, front femora with about the basal half, middle 

 femora with the base black; hind femora black with the apical part 

 yellow ; the black parts are grey or brownish pruinose, shining somewhat 

 greenish olive ; tibiæ yellow, hind tibiæ a little darkened at the apex ; front 

 tarsi long, metatarsus thin, twice as long as the four following joints, 

 these latter are cornpressed, a little dilated and with long, feathery 

 hairs at the dorsal margin (they give therefore the impression of being 

 much dilated) ; metatarsus yellow with the very apex black, the other 

 joints and the hairs black, the hairs on the fifth joint yellowish 

 towards the apex; posterior tarsi dark yellow with the apex of the 

 joints black, the last two joints generally quite dark, The legs have 

 short, black hairs, the front coxæ somewhat longer hairs, which are 

 bristly above ; femora with somewhat long hairs below which are 

 fine on the front femora; the middle femora have one preapical 

 bristle, the hind femora about four; front tibiæ with bristles above 

 and a pair of small bristles below; posterior tibiæ with two dorsal 

 rows of bristles and one ventral row. Wings about hyaline; veins 

 black; costa only slightly thickened between the base and the apex 

 of the subcostal vein; discai vein with a small bend about in the 

 middle between the apex and the posterior cross-vein or nearer the 

 latter, the apical part of the vein converging towards the cubital vein; 

 the posterior cross-vein slightly curved or straight, with a very in- 

 distinct seam. Squamulæ yellowish white, with a black fringe. 

 Balteres pale yellow, slightly darkened at the base of the peduncle. 



Female. Antennæ about as in the male. Epistoma a little 

 broader upwards, grey. Front tarsi simple, a little compressed, meta- 

 tarsus about as long as the four following joints. 



Length about 5 mm. 



The pupa has a length of 5,5 mm. 



This species is in the male at once recognised by the shape of 

 the front tarsi; in the female it is very similar to ammobates, but 

 it is distinguished by the middle femora having longish hairs below 

 in the whole length, and not longer towards the base, by the quite 

 yellow anterior tibiæ and by the middle tibiæ having only one ven- 

 tral row of bristles, while in ammobates there are two. 



T. msignis is rare in Denmark, I have only seen four specimens, 

 one from earlier time, vvithout locality, one from Fure Sø (Wesen- 

 berg Lund), one from Egholm at Skelskør (the author), and finally 

 one from Bornholm, kindly sent to me from Mr. Th. Becker; (probably 

 Becker took more specimens). My only date of capture is ^^/o. Dr. 



