DOLICHOPUS. 71 



39. I>. discifer Stank. % and 9 • — Viridis, facie alba, antennis ni- 

 gris, ciliis oculorum inferioribus albis, tegularum ciliis nigris, pedibus 

 flavis, femorum posticorum apice concolore, tarsorum anticorum articulo 

 ultimo nigro, iu mare inodice dilatato, alarum vena longitudinali quarta 

 non fracta. 



Green ; face white, antennae black ; cilia of the inferior orbit white, cilia 

 of the tegulae black ; feet yellow, tip of the hind femora not blackened; 

 the last joint of the fore tarsi black, in the % moderately enlarged ; 

 fourth longitudinal vein of the wings not broken. Long. corp. 0.25 — 

 0.26. Long. al. 0.24. 



Syn. Dolichopus patellatus Meigen, Syst. Beschr. IV, 86, 22. 

 Dolichopus discifer Stannius, Isis 1831, 57, 10. 

 Dolichopus confusus Zetterstedt, Ins. Lapp., 709, 7. 

 Dolichopus patellatus Staeger, Kroyer's Tidskr. IV, 21, 12. 

 Dolichopus discifer Zetterstedt, Dipt. Scand., II, 533, 28. 



Walker, Dipt. Brit. I, 163, 20. 

 Dolichopus tanypus Loew, Neue Beitr. VIII, 24, 26. 



Bright green. Face white, in the % upon the upper half gene- 

 rally more yellowish-white. Antennae black ; first joint upon the 

 under side red, third joint elongated-ovate, rather large; arista 

 with a very short, but distinct pubescence ; it is inserted beyond 

 the middle of the third joint. Front shining green. Cilia of the 

 inferior orbit white. Fore coxae yellowish, beset upon their front 

 side with delicate white hairs, and only on the inner side in the ? 

 with some black hairs. Middle and hind coxae blackish, at the 

 tip yellowish. Feet yellowish; hind femora with a bristle before 

 the tip. Hind tibiae somewhat brownish-black only at their ex- 

 treme tip, particularly on the inner side. Fore tarsi, although 

 darker from the tip of the first joint, but only the last joint black ; 

 middle tarsi from the tip of the first joint black; hind tarsi en- 

 tirely black, seldom only brown at the base of the first joint. 

 Cilia of the tegulae black. Wings grayish hyaline; fourth longi- 

 tudinal vein not broken, towards its end somewhat more converging 

 with the third than in most of the other species. 



Male, Lamellae of the hypopygium not very large, elongated 

 ovate, white, on the upper and apical margin with a very narrow 

 black border, on the latter somewhat jagged and fringed with 

 black bristles. Hind femora not ciliated. Hind tibiae slender, 

 without glabrous spot upon their hind side. Fore tarsi exceed- 

 ingly slender and elongated, the four first joints yellow, still some- 

 what darker beyond'the tip of the first joint, each following joint 



