Dolichopodidae. 91 



haired at the base. Hypopygium somewhat large, black, greyish 

 pruinose on the anterior part and above; the eighth segment with 

 black hairs; there are srnall posterior ventral lobes, with a little 

 point at the end; the inner lamellæ cur- 

 ved downwards, the median quite thin, 

 the lateral a little dilated; the outer la- 

 mellæ not large, somewhat triangalar and 

 pointed; they are whitish, towards the 

 end with a narrow, brownish margin; 

 at the end there are a couple of teeth 



with curved, black hairs, the ventral ,,. ^, ^ 



,. , ,, , -, .,,1 1 • l]g. '2^2. D.vifripenms. Apical 



margm shghtly serrated, with short hau's, part of hypopygium. 



and on the inner side with inwards cur- 

 ved hairs; the anterior ventral corner is somewhat produced and has 

 a tuft of short, black hairs. Legs black, coxæ grey, a little lighter 

 anteriorly; all tibiæ, and the anterior metatarsi except the apex, yel- 

 low, the hind tibiæ blackened at the apex. The legs have short, 

 black hairs, the hind femora longer hairs above in the basal part; 

 posterior femora with one preapical bristle; front tibiæ with bristles 

 above and two postero-ventral bristles; middle tibiæ with about four 

 to five antero-dorsal (one of them dorsal), two postero-dorsal bristles 

 and one ventral below the middle; hind tibiæ with two dorsal rows 

 and with one ventral bristle below the middle, besides a ventral row 

 of small bristles; hind metatarsi with two dorsal and one anterior 

 bristle. Wings hyaline; veins black or blackish brown, costa with a 

 very small swelling only forming a point; discai vein with an obtuse, 

 slightly angular bend ; axillary lobe somewhat large, anal vein directed 

 somewhat downwards. Squamulæ yellow, with a black fringe. Halteres 

 yellow. 



Female. Epistoma broad, whitish, Antennæ shorter than in the 

 male, third joint short, shorter than broad. Wings slightly yellowish 

 tinged. 



Length 3,4 — 3,7 mm. 



D. vitripennis is like the preceding a rare species in Denmark; 

 Tisvilde (the author), and in Jutland at Sminge near Silkeborg (Th. 

 Mortensen), Hald near Viborg (the author), Hulsig north of Frederiks- 

 havn (Th. Mortensen), and on Læsø (H. J, Hansen). My dates are ^'c 

 to the last part of July. It occurs in marshy districts and often near 

 the coast. 



Geographical distribution:— Northern and middle Europe down 

 into France; towards the north to middle Sweden, and in Finland. 



