Dolichopodidae. 123 



hind tarsi black. The legs have short, black hairs, coxæ white-haired 

 with only the bristles black; hind femora with a little longer hairs 

 above towards the base, and a little pale-haired below; posterior 

 femora with one preapical bristle; front tibiæ with a few bristles 

 above, and one on the postero-ventral side; mlddle tibiæ with three 

 to four antero-dorsal (one of them more dorsal), two postero-dorsal 

 bristles, and one ventral bristle below the middle; hind tibiæ with 

 two rovvs of dorsal bristles, one, rather small, ventral bristle towards 

 the apex, and a dense ventral row^ of small bristles; hind metatarsi 

 with two dorsal bristles and only very small bristles below. Wings 

 tinged somewhat brown, most towards the anterior margin; veins 

 black, costa with a long swelling; discai vein with a small, obtuse 

 bend; axillary lobe small, anal vein directed forwards. Squamulæ 

 whitish yellow, with a yellow fringe. Balteres pale yellow. 



Female. Epistoma broader than in the male, but not specially 

 broad, whitish grey. Antennæ shorter than in the male, third joint 



.-=--.-. — %^ 



Fig. 37. Antenna of D. acuticornis 9, from the inside. X 65. 



slightly longer than broad, but with a distinct apex, turned a little 

 upwards. Coxæ for the most part black-haired. Wings without costal 

 swelling. In the squamular fringe there may be more or less numerous 

 black hairs, until the fringe becomes quite black. 



Length 3,4—4,4 mm. 



D. acuticornis is not properly common in Denmark; Hellebæk, 

 Nordskoven at Jægerspris, Tisvilde, Faxe Ladeplads; on Langeland at 

 Lohals, and in Jutland at Funder near Silkeborg, Sæby, Frederiks- 

 havn, and on Læsø. My dates are ^/e to the first part of August. It 

 occurs generally near the coast. 



Geographical distribution: — Northern and middle Europe down 

 into the Alps; towards the north to middle Sweden. 



32. D. longicornis Stann. 



183L Stann. Isis 1831, 53, 7. — 1843. Zett. Dipt. Scand. II, 529, 

 25, et 1849. VIII, 3079, 25. — 1862. Schin. F. A. I, 218. — 1903. Kat. 

 palåarkt. Dipt. II, 299. — Dolichopus acuticornis 1824. Meig. Syst. Beschr. 

 IV, 94, 34. — 1842. Stæg. Krøyer's Tidsskr. IV, 17, 7. 



