Stevenia. 251 



cell long petiolate, the pedimcle ending near apex of wing; posterior 

 cross- vein nearer the angle than the medial cross- vein. Squamulæ 

 white. Halteres yellow. 



Fig. 69. Wing of R. lepida. 



Female. Similar; frons somewhat broader; orbits blackish and 

 shming above; jowls a httle broader than in male. Abdomen quite 

 black. 



Length. About 4 — 5,5 mm. 



R. lepida is common in Denmark; Copenhagen in gardens, 

 Hellerup, Boserup; on Langeland at Lohals; on Lolland at Nysted; 

 on Falster at Nykøbing; on Funen at HofTmansgave, and in Jutland 

 at Sønderborg, Skeide, Madeskov, Sandager, Hejls, Kolding, Skander- 

 borg and Hov near Odder; the dates are ^/f — ^^'/o- I have taken it in 

 copula on ^/^ 



Geographical distribution: — Europa down into France; to- 

 wards the north to southern Sweden. 



43. Stevenia R. D. 



Smallish species of black colour with slight pruinosity. Head 

 about of the breadth of thorax, somewhat convex behind and puffed 

 out below, nearly as long as high. Frons broad in both sexes, somewhat 

 protruding and not rounded in profile. Jowls about one third of the 

 height of the eye or more. In both sexes small ocellar bristles, inner 

 vertical and in female two orbital bristles, in male one or none. 

 Frontal bristles reaching to insertion of antennæ, the uppermost 

 reclinate, in female an outwards directed bristle above. Cheeks 

 hairy, and with some bristles below. Vibrissæ not ascending. Eyes 

 bare. Epistoma somewhat reflected below. Oral cone and proboscis 

 of medium length. Palpi thin, thread-like. Antennæ inserted below 

 middle of the eye, third joint as long as second; arista short-pubescent. 



