Doliehopodidae. 101 



country, and is generally present in great numbers. It occurs gener- 

 ally on meadows, humid piaces in woods and near water, on bushes 

 and in low herbage, but it niay otherwise be found almost every- 

 where, both near the shore and inland. My dates are ^/e — ^^/s. 



Geographical distribution: — Europa down to Italy; towards the 

 north to northernmost Scandinavia, in Finland and in Siberia. It also 

 occurs in North America and in Greenland. 



20. D.Wahlbergi Zett. 



1843. Zett. Dipt. Scand. II, 546, 38, et 1852. XI, 4293,38. — 1857. 

 Loew, Neue Beitr. V, 12, et 1859. VI, 10,8. — 1875. Verrall, Ent. Month. 

 Mag. XII, 32. — 1903. Kat. palåarkt. Dipt. II, 306. 



Male. Vertex and frons green or golden green. Epistoma some- 

 what narrow, ochraceous, stretching almost to the lower margin of 

 the eyes. Palpi yellow. Occiput greenish or more golden, greyish 

 pruinose; postocular bristles yellow, black above. Antennæ a little 

 longer than the head, the third joint somewhat ovate, but the upper 

 margin a little concave; the basal joints and the lower basal corner 

 of the third joint yellow, the rest black. Thorax green or golden 

 green, sometimes with indications of stripes; it is somewhat pruinose, 

 not much shining; scutellum very fmely yellow pubescent; post- 

 scutellum green, greyish pruinose. Pleura greenish or golden, grey 

 pruinose; propleura with fine, pale hairs and a black prothoracic 

 bristle. Abdomen green or golden green, with some more or less 

 distinct coppery reflexes, slightly whitish pruinose downwards, and 

 with very narrow, dark hind margins to the segments; it is clothed 

 with short, black hairs and has longer hindmarginal bristles, longest 

 on the first segment. Venter greyish, slightly pale-haired. Hypo- 

 pygium black or æneous black, greyish pruinose; eighth segment with 

 black hairs ; there are somewhat projecting posterior ventral lobes 

 with a little point at the dorsal apical angle; the inner lamellæ about 

 as in plumipes, but the outer lamellæ with more long teeth at the 

 end. Legs yellow, posterior coxæ grey, the hind ones a little yellow 

 at the apex; front tarsi infuscated or blackened towards the end; 

 middle tibiæ long, much longer than in plumipes, considerably longer 

 than the femora and almost twice as long as the tarsi ; they are thin, 

 but not flat, and quite yellow, a little whitish at the apex anteriorly; 

 the metatarsus is more strongly feathered than in plumipes, and it is 

 longer, almost as long as the four following joints; it is black, but 

 white at the very base; the hind tibiæ are quite yellow, and the hind 

 tarsi yellow at the base, the rest black. The legs have short, black 

 hairs, the front coxæ white-haired outwards, the hind femora pale- 



