320 Orthorthapha l)iachycera. 



the middle tiblæ almost wanting. The legs are yellowish or pale 

 brownish haired. Wings hyaline. Veins blaek. Balteres pale yellow. 



Female. Similar to the male ; abdonien pointed and shorter 

 haired. 



Length 2,3 — 2,5 mm. 



T. nigritarsis is not common in Denmark, but has, however, 

 been taken at several piaces; Lersøen, Tyvekrog, Tisvilde, at Vemme- 

 tofte; on Langeland at Lohals; on Funen at Hoffmansgave; in Jutland 

 at Hald near Viborg, Struer, Hobro and Frederikshavn; my dates 

 are ^'^k to August. It occurs in woods on bushes and on low her- 

 bage on somewhat humid and shaded piaces. 



Geographical distribution: — Europe down into Spain and Italy; 

 towards the north to northern Sweden, and in Finland. 



3L T. longicornis Meig. 



1822. Meig. Syst. Beschr. III, 73, 12, Tab. XXIII, Fig. 17. — 1903. 

 Kat. palåarkt. Dipt. II, 284. — Tachydromia pubicornis : 1838. Zett. Ins. 

 Lapp. 553, 15, et 1842. Dipt. Scand. I, 304, 39. 



Male. Frons and vertex grey; epistoma narrow, whitish grey; 

 palpi small, vi^hitish; proboscis black. Occiput grey, with two long 

 and some short, black bristles above and with white hairs below. 



Fig. 141. Antenna of T. longicornis. X 100. 



Antennæ black, sometimes a little pale at the base, long, distinctly 

 pubescent; the third joint is much elongated, narrow, more than 

 twice as long as the short arista. Thorax black, shining, brownish 

 pruinose at the margin; the uniserial dorsocentral and biserial acro- 

 stichal hairs yellow ; there is one long dorsocentral bristle behind and 

 there are two notopleural bristles, all dark brown or black. Scutellum 

 brownish pruinose, with two dark brown or black marginal bristles, 

 and on each side a smaller hair. Pleura dark greyish pruinose; above 

 the middle coxæ a black, polished spot. Abdomen black, shining, 

 with short, yellowish hairs; venter black. Legs yellow or reddish 

 yellow, the four last tarsal joints brown or blackish. The front 

 femora somewhat, the middle femora slightly more thickened; the 

 apical spine on the middle tibiæ almost wanting. The legs are yellow 

 haired; the bristles towards the apex on the anterior side of the 



