106 Orthorrhapha brachycera. 



ventrally at the base. Anterior margin of the wing and the stigma a 

 little more yellowish than in the male. 



Length about 3 mm. 



This species is easily known from hijalipennis by the abbreviated 

 anal vein and the bristles on thorax being black; also the male 

 genitalia are of quite a different shape, and the legs in the female 

 pennate in another way and for the rest there are several other 

 characters. 



E. alhinervis is very rare in Denmark, only one specimen, a male, 

 has been taken, on Funen at Middelfart on '^^li 1907 (the author). 



Geographical distribution: — Northern and middle Europe down 

 into Styria; towards the north to middle Sweden. 



12. E. vitripennis Meig. 



1822. Meig. Syst. Beschr. III, 25,15. - 1862. Schin. F. A. I, 106. - 

 1867. Loew, Berl. ent. Zeitschr. XI, 57, 3 et 163, et 1869. XIII, 88. — 

 1903. Kat. palåarkt. Dipt. II, 246. 



Male. Eyes contiguous; epistoma greyish black. Occiput dark 

 grey with black hairs. Labrum long and thin, twice as long as the 

 head is high, blackish, brown at the apex; palpi black. Antennæ 

 black, third joint somewhat short, the style elongated. Thorax black, 

 slightly greyish, somewhat shining. The dorsocentral and acrostichal 

 bristles of moderate length, black, biserial, the former longer and 

 uniserial behind. Further a humeral bristle, a posthumeral, about 

 two notopleural, a supraalar and a postalar bristle, all black; the 

 notopleural bristles rather distinct, the others not very conspicuous 

 among the hairs on the sides of thorax, as the humeri and the præ- 

 sutural depression are somewhat densely clothed with rather long 

 hairs, Scutellum with two black marginal bristles. Pleura grey, meta- 

 pleura with black bristles; propleura with short hairs. Abdomen 

 black, shining, slightly greyish, clothed with somewhat short, erect, 

 yellowish hairs which are longest at the sides. Venter similarly coloured 

 and sparingly haired. Exterior genitalia not large, the lower lamellæ 

 directed straightly backwards or more or less upwards, somewhat 

 blade-shaped, each with two small, styliform processes at the apex (the 

 inner perhaps belonging to the otherwise hidden upper lamellæ); the 

 eighth ventral segment somewhat arched. Penis thickened at the 

 base, curved upwards between the lamellæ. Legs black or dark 

 brownish; coxæ greyish pruinose; hind legs elongated; front metatarsi 

 exceedingly slightly thickened, hind metatarsi distinctly and the apex 

 of the hind tibiæ somewhat thickened. Front femora with a row of 

 fine hairs below; middle femora with an antero- and postero-ventral 



