Dolichopodidae. 371 



part, the posterior margin with a shallow excision between the anal 

 vein and the end of the postical vein ; cubital vein curved upwards 

 towards the apex, thus the first posterior cell widened towards the 

 end. In the female the wings of usual shape. 



The developmental stages not known. 



Of the genus only one species is known, and besides a doubtful 

 species, E. atonius Zett. 



1. E. alpinus Hal. 



1833. Hal. Ent. Mag. 1. 163 {Medeterus). — 1878. Mik, Dipt. Unters. 

 Jahresber. d. k. k. akad. Gymn. Wien, 1878, 8, 10, Tab. I, Fig. 13—14. — 

 Dolichopus pundipennis Zett. 1849. Dipt. Scand. VIII, 3091, 86 — 87. 



Male. Vertex and frons bluish. Epistoma narrow, silvery white, 

 quite disappearing above on account of the eyes meeting. Occiput 

 greenish, greyish pruinose; postocular bristles white, the uppermost 

 black. Antennæ black, short, third joint somewhat roundish. Thorax 

 dark olive, slightly violet, and brown pruinose ; propleura with pale 

 hairs and a small, pale prothoracic bristle. Abdomen greenish or 

 æneous, somewhat greyish pruinose at the sides; it is thinly clothed 

 with short, black hairs, and has short hindmarginal bristles, only 

 slightly longer on the first segment. Legs yellowish, front coxæ some- 

 what grey at the base, and greyish white pruinose anteriorly; posterior 

 coxæ grey; front femora a little darkened above and below; tarsi 

 with the apex of metarsus and the foUowing joints blackish. The legs 

 have short, blackish hairs, coxæ pale-haired ; front coxæ with a few, 

 black bristles at the apex; the front tibiæ have a dorsal and a 

 postero-ventral bristle; middle femora with about six, short, some- 

 what strong bristles below, about in the middle, nearer the apex 

 than the base; middle tibiæ with three antero-, one postero-dorsal 

 bristle, and one, somewhat long ventral bristle below the middle; 

 hind femora with a preapical bristle, hind tibiæ with some dorsal 

 bristles in two rows, and two ventral bristles. Wings narrow, with a 

 shallow excision in the posterior margin between the anal vein and 

 the apex of the postical vein, and thus narrow towards the base; 

 they are brown, especially on the apical part; there is a roundish, 

 indefinitely bordered, hyaline spot behind the end of the discai cell ; 

 the posterior cross-vein is a little seanied, and on the middle of the 

 last part of the discai vein and in the apex of the cubital cell there 

 is a somewhat darker, brownish spot ^ ; the veins are brownish black, 



^ The wings in my specimen are coloured quite as in Mik's figure 1. c, but they 

 are much less dark. 



24* 



