112 Orthorrhapha brachycera. 



middle tibiæ with two rows of bristles below and a row of about 

 four long ])ristles above, besides with a short, dense pubescence on 

 the anterior side; hind tibiæ with dense, somewhat longish hairs be- 

 low and two rows of shorter and longer bristles above; tarsi some- 

 what spinulous beneath; the dense pubescence on the ventral side of 

 the front tibiæ and on the anterior side of the middle tibiæ is con- 

 tinued out on the tarsi; hind metatarsi with long hairs above. The 

 hairs and bristles are black or brownish, the short, dense pubescence 

 pale. Wings somewhat brownish or yellowish tinged; veins darker 

 or lighter brown. Stigma brown. Balteres yellow. 



Female. Frons broad, blackish grey. Abdomen shorter haired 

 than in the male and generally of darker colour, only pale on the 

 venter towards the base. Legs compressed, posterior femora pennate 

 on both sides, anterior tibiæ pennate above, hind tibiæ likewise and 

 also below in about the basal half; the scaly hairs on the ventral 

 side of the femora are short at the base but increase in length to- 

 wards the apex, on the dorsal side of the middle femora they are 

 on the contrary long at the base but decrease in length outwards. 

 Wings more strongly brownish than in the male. 



Length 5 — 5,6 mm. 



This species shows some resemblance to pennipes, but besides 

 by the colour it may in the male be distinguished by a difference in 

 the genitalia and the way in which the legs are haired; also the 

 præsutural depression is bare in ruf^ventris but hairy in pennipes; in 

 the female the species is distinguished by the anterior metatarsi not 

 being pennate above, and the hind tibiæ only pennate in the basal 

 half below; fmally the present species is larger than pennipes. 



E. rufiventris is not rare in Denmark, but may on the other 

 hånd scarcely be termed common; Ordrup Mose, Ermelund, Dyre- 

 haven, Boserup near Roskilde; on Falster at Resle and on Langeland 

 at Lohals. It occurs in somewhat open piaces in woods in low 

 herbage and on bushes; like the preceding species it occurs on the 

 flowers of Geranium Robertianum; I once took it in some number 

 in Ermelund on ^^k and exclusively on the flowers of the Geranium 

 while not one was seen on other piants. My dates are ^*^/5 — ^/t, it 

 is thus a somewhat early species. 



Geographical distribution: — Northern and middle Europe down 

 into Styria; its northern limit lies in the southern Sweden. 



15. E. decora Meig. 



1822. Meig. Syst. Beschr. III, 22, 9, Tab. XXII, Fig. 18. - 1862. 

 Schin. F. A. I, 107. — 1903. Kat. palåarkt. Dipt. II, 236. 



