38 Orthorrliapha brachycera. 



21. Front coxæ quite yellow, posterior coxæ darker; hind 



metatarsi in the male not thickened 19. nigripennis. 



— All coxæ blackish; hind metatarsi in the male slightly 



thickened 20. umhripennis. 



1. Rh. platyptera Panz. 

 1794. Panz. Fn. Germ. XXIV, 23 {Empis). — 1851. Lefebr. Ann. Soc. 

 Ent. Fr. 2, IX, 125, pi. IV, fig. 1—4 [Empis). — 1862. Schin. F. A. I, 97. 



— 1903. Kat. palåarkt, Dipt. II, 228. — Empis marginata: 1805, Fabr. 

 Syst. Antl. 138, 3. — 1859. Zett. Dipt. Scand. XIII, 5017, 29—30. — 

 Rhampomyia marginata: 1843. Jacobsen, Naturh. Tidsskr. IV, 1842 — 43, 211. 



Male. Eyes contiguous. Epistoma grey; occiput grey with black 

 hairs; labrum about as long as the head is high. Antennæ with the 

 third joint a little elongated, black or brownish black ; the basal joints 

 slightly lighter and hairy. Thorax duU grey with a narrow, median 

 and two broader, lateral, brown but indistinct stripes; on the anterior 

 part there is on each side of the median stripe a narrow stripe, these 

 two stripes diverging anteriorly. The dorsocentral bristles are of 

 moderate length, somewhat irregularly biserial, the acrostichal bristles 

 uniserial, very short, only visible behind; there are humeral, post- 

 humeral, notopleural, supraalar and postalar bristles; all the bristles 

 black. Scutellum grey with six, somewhat strong marginal bristies. 

 Pleura grey with black metapleural bristles. Abdomen grey, not 

 shining; venler of the same colour. Abdomen is densely clothed 

 with erect, blackish or brown hairs, at the hind margin of the seg- 

 ments there are strong hairs; venter has long, scarce hairs. The 

 exterior genitalia are small, the lower lamellæ triangular, somewhat 

 pointed, shining, the upper lamellæ apparently doubled, so that four 

 small, styliform pieces are seen; all lamellæ with long hairs. Penis 

 is brown, so far as I could see simply curved. Legs brown (the de- 

 scription is made after old museum specimens which are perhaps 

 somewhat bleached), slightly shining; coxæ somewhat greyish pruinose. 

 Front feniora short-haired ; middle femora with anterior, ventral and 

 posterior rows of hairs, and with short hairs above; hind femora 

 similarly haired but the hairs longer, and with long, bristle-like hairs 

 in an anterior and postero-ventral row which are longest towards 

 the apex; the anterior tibiæ with rows of short hairs and with some 

 bristles on the dorsal side; the hind tibiæ with very long hairs, 

 especially on the dorsal side, and also with a ventral row, between 

 the hairs on the dorsal side there are some long, thin bristles; the 

 two first joints of the hind tarsi are haired like the tibiæ, otherwise 

 the tarsi are short-haired; the hind tarsi fmely spinulous below; all 

 the hairs are brownish. Wings slightly broadened but of normal shape, 



