106 Oithorrhapha brachycera. 



at Lohals; on Funen at Veflinge; in Jutland at Silkeborg, Funder 

 near Silkeborg, Dollerup near Viborg and Frederikshavn, and on Born- 

 holm at Rønne. My dales ara ^le—^^h. It occurs in fens, in woods 

 on open, humid piaces, and at water, on bushes and in low herbage. 

 The larva was taken in Ermelund in mole-casts on ^^/4, they formed 

 cocoons on ^'^/4 and Ihe imagines came on ^^/s — ^^U>. 



Geographical distribution : — Northern and middle Europe down 

 into France; towards the north to middle Sweden, but somewhat rare. 



23. D. urbanus Meig. 



1824. Meig. Syst. Beschr. IV, 92, 31. — 1831. Stann. Isis 1831, 123, 

 18. — 1842. Stæg. Krøyei-'s Tidsskr. IV, 27, 18. — 1843. Zett. Dipt. Scand. 

 II, 547, 39. — 1862. Schin. F. A. I, 219. — 1903. Kat. palåarkt. Dipt. 

 II, 306. 



Male, Vertex and frons green. Epistoma somewhat narrow, white. 

 Palpi yellow, Occiput green, greyish pruinose; postocular bristles yel- 

 low below, black above. Antennæ short, shorter than the head, the 

 third joint short triangularly ovate; the basal joints and the lower 

 basal part of the third joint yellow, the rest black or brownish black. 

 Thorax green or golden green, somewhat pruinose and not much 

 shining; generally there is a less pruinose, more shining middle stripe; 

 scutellum with fine, yellow pubescence; postscutellum green, greyish 

 pruinose. Pleura green, greyish pruinose; propleura with fme, pale 

 hairs and a black prothoracic bristle. Abdomen green, sometimes 

 somewhat coppery, whitish pruinose downwards, and with narrow, 

 darkened hind margins to the segments; it is clothed with short, 

 black hairs. and has hindmarginal bristles, longer on the first segment. 

 Venter greyish, very slightly pale-haired at the base. Hypopygium 

 æneous black, greyish pruinose; eighth segment with black hairs; 

 there are a little projecting, whitish posterior ventral lobes, tapering 

 into a small lobe at the apical dorsal corner; the inner lamellæ cur- 

 ved downwards, the median thin, the lateral dilated, with a dilatation 

 at the apex, and two small spines at the upper margin ; the outer 

 lamellæ nearly ovate, whitish with a blackish brown margin along 

 the ventral, apical and posterior part of the dorsal edge; the end has 

 some long teeth with curved, black hairs; the ventral margin is ser- 

 rated, with long, curved hairs, and inwards paler, curved hairs. Legs 

 yellow, front coxæ white pruinose anteriorly, posterior coxæ grey, 

 yellow at the apex; front tarsi with the three last joints blackish, 

 middle tarsi with the apical part of the third joint and the fourth 

 joint black, the last joint white, silvery on the anterior side; hind 

 tibiæ black in about the whole length, only the base yellow, but the 



