144 Orthorrhapha brachycera. 



42. D. brevipennis Melg. 



1824. Meig. Syst. Beschr. IV. 89, 27. — 1831. Stann. Isis 1831, 

 60, 12. — 1842. Stæg. Krøyer's Tidsskr. IV, 23, 13. — 1843. Zett. Dipt. 

 Scand. II, 511, 10, et 1849. VIII, 3077, 10, et 1855. XII, 4623, 10. — 

 1862. Schin. F. A. I, 221. — 1903. Kat. palåarkt. Dipt. II, 296. — Doli- 

 chopus plumitarsis Fall. var. y9. 1823. Dipt. Suec. Dol. 10, 4. 



Male. Vertex and frons green, sometimes bluisli. Epistoma nar- 

 row, brownish yellow. Palpi dark yellow. Occiput green, greyish 

 pruinose; postocular bristles black. Antennæ not quite as long as 

 the head, black, third joint a little longer than broad, short pointed. 

 Thorax green, sometimes æneous, generally with a more golden or 

 coppery middle stripe; it is somewhat pruinose, not much shining. 

 The inner posthumeral bristle is as strong as the outer. Scutellum 

 finely yellow pubescent; postscutellura green or æneous, grey pruinose. 

 Pleura greenish or æneous, greyish pruinose; propleura with some- 

 what long, yellowish hairs and a black prothoracic bristle. Abdomen 

 green, with more or less distinct coppery reflexes, and with very 

 narrow, dark hind margins to the segments; it is slightly, greyish 

 white pruinose downwards, and is clothed with short, black hairs; 

 there are somewhat short hindmarginal bristles, a little longer on 

 the first segment. Venter green, slightly pruinose, with somewhat 

 long, dark yellow or brownish hairs; they are specially long on 

 third segment, and curved outwards. Hypopygium black, slightly 

 æneous, greyish pruinose; eighth segment with somewhat long, black 

 hairs; there are slightly projecting, somewhat rounded posterior ven- 

 tral lobes, bearing a little style at the upper apical corner; the inner 

 lamellæ large, strongly curved, the median angularly bent, somewhat 

 hook-shaped, dilated in the middle at the angle, and here with a 

 pair of bristles at the upper margin; the lateral dilated towards the 

 apex, and at the apex with a dilatation, separated off by an excision; 

 the outer lamellæ are somewhat large, the dorsal margin straight, the 

 ventral rounded; they are yellow to brownish, with a broad, black 

 margin along the ventral and apical edge ; at the end there are some- 

 what numerous teeth with curved, black hairs, and dorsally to them 

 a pair of curved hairs; the teeth decrease evenly in length towards 

 the ventral margin, which has shorter, dense hairs, and on the inside 

 there are dense, black, inwards curved hairs in about the apical half. 

 Legs yellow, front coxæ grey at the base, posterior coxæ grey; front 

 tarsi long and thin, the two last joints black, the fourth joint com- 

 pressed, a little dilated, triangular; the fifth joint strongly compressed 

 and dilated, oval, black-haired at the dorsal margin; middle tarsi 

 with the apex of metatarsus and the four following joints black ; hind 



