Dolichopodidae. 79 



more dense at the anterior corner. Legs with all tarsi long, con- 

 siderably longer than the tibiæ, the metatarsi elongated, much longer 

 than the second jomt; the legs are black; coxæ grey, a little lighter 

 pruinose anteriorly; knees very narrowly reddish; front metatarsi, ex- 

 cept the apex, yellowish or pale brownish ; middle tibiæ with a broad, 

 snow-white ring a little below the middle, and the metatarsus snow- 

 white except the very apex, and silvery on the anterior side. The 

 hind tibiæ have a curvature at the base, with the convex side 

 behind, The legs have short, black hairs, hind femora with longer 

 hairs above towards the base, and with a fringe of long, black hairs 

 below in the apical half; posterior femora with one preapical bristle; 

 front tibiæ with rovvs of bristles above and on the posterior side; 

 middle tibiæ with about five antero-dorsal, two or three dorsal, three 

 antero-ventral and one postero-ventral bristle, the latter below the 

 middle; hind tibiæ with a dorsal and antero-dorsal row, one ventral 

 bristle below the middle, and a ventral row of fme bristles; the long 

 metatarsus with four bristles above and some on the anterior side 

 and below; middle metatarsus with a bristle above after the middle, 

 and shorter bristles below. Wings almost hyaline; veins black, costa 

 with a small, but somewhat elongated swelling; discai vein with a 

 small, obtuse bend ; axillary lobe somewhat well developed, anal vein 

 not stretching long forwards. Squamulæ yellow with a black fringe. 

 Halteres yellow. 



Female. Epistoma slightly broader than in the male. Antennæ 

 of about the same length as in the male. Front metatarsi blackish ; 

 the ring on the middle tibiæ very obscured, and also the metatarsi 

 less clear white and not silvery anteriorly; hind femora with some- 

 what longish hairs beneath, but without fringe. Wings without costal 

 swelling. 



Length 5 — 5,5 mm. 



This beautiful species is easily recognised by the colour of the legs. 



D. Stenhammari is very rare in Denmark, only one specimen, a 

 male, has been caught in Lyngby Mose on ^/e 1909 (the author). 



Geographical distribution : — It is a boreal species ; towards the 

 south it goes down into Germany; towards the north it is found to 

 northernmost Scandinavia, in Finland and Siberia. It also occurs in 

 North America in Labrador and Alaska. 



7. D. campestris Meig. 



1824. Meig. Syst. Beschr. IV, 78, 8. — 1831. Stann. Isis 1831, 136, 

 30. — 1842. Stæg. Krøyer's Tidsskr. IV, 35,28. — 1843. Zett. Dipt. Scand. 



