Empididae. 239 



bare. Abdoraen consists in the usual way of eight segments; the male 

 genitalia somewhat resemble Ihose in Clinocera; the seventh and 

 eighth segments are lower than the foregoing and more or less co- 

 vered by the genitalia; these latter consist of tvvo pairs of lamellæ, 

 forming a forceps, and below there is a ventral lamella. Penis is 

 somewhat thick in the basal part, curved at the apex. In the female 

 the abdomen is pointed, and it terminates with two small, styliform 

 lamellæ, The legs are slender, the front coxæ only little elongated, 

 aboLit half as long as the femora. The legs are short-haired, and the 

 tibiæ have no apical spurs. There are two claws, two pulvilli, and a 

 small, linear, bristle-bearing empodium. The wings are brownish with 

 hyaline spots; the mediastinal vein reaches the margin; the subcostal 

 vein is short; the cubital vein is forked, and the upper branch is 

 connected with the radial vein by a cross-vein, there are thus three 

 cubital cells; the discai vein is likewise forked, and there are thus 

 four posterior cells; the discai cell is long and sends three veins to 

 the margin, the third is the upper branch of the postical vein, which 

 closes the discai cell below; the lower branch of the postical vein goes 

 straightly down, vertically towards the wing-margin. The anal vein 

 goes not distinctly beyond the anal cell; the second basal cell is 

 shorter than the first, the anal cell as long as the second basal 

 cell. No stigma. Axillary lobe and alula not developed, the wing- 

 margin fringed. Alar squamula very small and narrow, a little haired 

 at the margin. 



So far as I am aware the developmental stages are not known. 



The species of Dolichocephala are small, nice and delicate flies, 

 easily known by the brown, spotted wings. They occur in the her- 

 bage and grass in woods and fens, at the border of water, and on 

 the whole in humid piaces. The structure of the head and the mouth, 

 and also of the male genitalia seems to show, that the genus is nearly 

 allied to Clinocera. 



Of the genus 4 species are known from the palæarctic region, 

 two of which have hitherto been found in Denmark. 



Tahle of Species. 



1. Wings with hyaline spots in the subcostal and first cubital 



cell, the radial and cubital veins somewhat undulated 1. irrorata. 



— Wings without hyaline spots in the subcostal and first cubi- 

 tal ceh, the radial and cubital veins not undulated 2. guttata. 



1. D. irrorata Fall. 



1815. Fall. Dipt. Suec. Empid. 13, 17 (Tachtjdromia) . — 1822. Meig. 

 Syst. Beschr. III, 66, 9, Tab. XXIII, Fig. 11 (Hemerodromia). — 1842. Zett. 



