Dolichopodidae. 125 



middle tarsi generally with the apex of the two first joints, and the 

 three last joints quite brownish; hind tibiæ somewhat thickened to- 

 wards the apex, and here often a little darkened; hind tarsi black. 

 The legs have short, black hairs, the coxæ, except for the bristles, 

 mainly white-haired; hind femora pale-haired beneath; posterior femora 

 with one preapical bristle; front tibiæ with few bristles above, and 

 one or two on the postero-ventral side, and with a long, thin hair at 

 the tip on the ventral side; middle tibiæ with three or four antero- 

 dorsal bristles (one of them more dorsal), two postero-dorsal, and 

 with one ventral bristle below the middle; hind tibiæ with two dorsal 

 rows of bristles, one ventral towards the apex, and a somewhat dense 

 row of small ventral bristles; hind metatarsi with two bristles above, 

 one anterior, and very small bristles below. Wings a little brownish 

 tinged; veins black or brownish black, costa with a somewhat large 

 swelling, which is elongated, but shorter than in acuticoniis; discai 

 vein with a slight, obtuse bend; axillary lobe small, anal vein directed 



Fig. 39. Antenna of D. longicornis 9, from the inside. X 65. 



forwards. Squamulæ whitish yellow, with a yellow fringe. Halteres 

 pale yellow. 



Female. Epistoma broader than in the male, and a little more 

 greyish. Antennæ shorter, with the third joint considerably shorter, 

 but distinctly attenuated towards the apex and pointed. Coxæ more 

 black-haired than in the male. Wings without costal swelling, The 

 squamulæ may have the fringe quite yellow, but there are generally 

 more or less numerous black hairs, until the fringe is quite black. 



Length 3,5 — 4,3 mm. 



D. longicornis is a common species in Denmark; Copenhagen in 

 gardens. Lersøen, Amager, Vester Fælled, Damhusmosen, Charlotten- 

 lund, Ordrup Mose, Ermelund, Fure Sø, Hillerød, Rørvig, Tisvilde, 

 Sorø, Faxe Ladeplads; in Jutland at Vestbirk near Skanderborg, Silke- 

 borg, Mønsted near Viborg, Holstebro and Frederikshavn, and on 

 Bornholm at Hasle. My dates are ^^k—^h. It occurs in meadows 

 and fens, and in low herbage and on bushes on humid piaces and 

 near water; I have f. inst. taken it numerously in Ordrup Mose on 

 the leaves of Petasites. 



