Dolichopodidae. 89 



of no consequence, as also other species are known, which are not 

 quite constant with regard to the colour of the squamular fringe. 



D. tanythrix is very rare in Denmark, and has only been taken 

 on one occasion, when four specimens, two males and two femaJes, 

 were taken at Sminge near Silkeborg in Jutland on ^^li 1909. (Th. 

 Mortensen). 



Geographichal distribution: — The species is, as far as I am aware, 

 only known from Denmark, Bohemia and Styria. 



13. D. atripes Meig. 



1824. Meig. Syst. Beschr. IV, 102,51. — 1831. Stann. Isis 1831,137, 

 31. — 1852. Zett. Dipt. Scand. XI, 4283, 19—20, et 1855. XII, 4625, 

 19—20. - 1862. Schin. F. A. I, 213. — 1903. Kat. palaarkt. Dipt. II, 295. 



Male. Vertex and frons green. Epistoma moderately narrow, 

 narrowed downwards, brown. Palpi blackish. Occiput green, a little 

 greyish pruinose ; postocular bristles white below, black above. Antennæ 

 black, shorter than the head, third joint short triangular, broader than 

 long. Thorax green, slightly greyish pruinose, shining; scutellum distinctly 

 yellow-haired; postscutellum green, grey pruinose. Pleura green, slightly 

 grey pruinose; propleura with fine hairs, which are brown above, paler 

 downwards, and with a black, prothoracic bristle. Abdomen green, 

 with slight bronze reflexes, fmely 

 whitish pruinose down the sides, 

 and with slight dark hind margins 

 to the segments. It is clothed with 

 short, black hairs; the segments 

 have bristles at the hind margin. 

 Venter grey, with slight, pale hairs 

 at the base. Hypopygium somewhat 

 large, black, but a little æneous at 

 the right side, greyish pruinose on Fig. 21. D. atripes. Apical part of 

 the anterior half ; the eighth segment lypopygmm. 



with black hairs ; there are slightly projecting, rounded posterior ventral 

 lobes; the inner lamellæ are very complicated, the median pointed, the 

 lateral large, whitish, flat, with various dilatations at the end ; the outer 

 lamellæ inserted somewhat dorsally, they are not quite of the usual 

 shape, the dorsal posterior corner being broadly rounded, so that they 

 get a curved appearance with a straight end margin (the real ventral 

 margin) ; they are dirty whitish to pale brown, the end has a narrow, 

 blackish margin ; the end margin is only slightly serrated and has 

 somewhat short, black hairs, and inwardly curved hairs, which are 

 dense at the posterior corner; above this the margin has still some 



