Dolichopodidae. 227 



has four long, slrong bristles. Venter greenish grey, somewhat yel- 

 low at the base, with long, black hairs, strengest at the hindmargins. 

 The narrow outer lamellæ of the hypopygium are dark. Legs yellow, 

 coxæ blackish grey, front coxæ with the very apex and the trochanters 

 yellow, the posterior trochanters brownish ; anterior femora somewhat 

 brownish above; hind femora dark just at the base, and blackish 

 brown on the apical half; anterior tibiæ yellow, hind tibiæ brownish, 

 darkest towards the apex; anterior tarsi with the apex of metatarsus 

 and the four following joints dark brown, hind tarsi blackish brown. 

 The legs have short, black hairs, front femora with long, bristly hairs 

 below, middle femora with short hairs; hind femora as in oculatus 

 with long hairs below at the apex on the posterior side, but they are 

 more bristly and less crowded, and continued beyond the apical half; 

 on the anterior side there are long, bristly hairs on about the apical 

 half, short hairs on the rest; front tibiæ with somewhat long hairs 

 above among which a pair of longer bristles; on the postero-ventral 

 side there are long hairs, continued out on the metatarsus, and finally 

 there are on the ventral side somewhat long hairs and a long bristle 

 below the middle ; middle tibiæ with an antero-dorsal bristle near the 

 base, two postero-dorsal bristles, and a ventral bristle below the 

 middle; hind tibiæ with a row of dorsal bristles, and some small 

 ventral bristles; front tarsi with long hairs above at the apex, and 

 the front pulvilli very enlarged. Wings somewhat brownish tinged ; veins 

 blackish brown. Squamulæ yellow, with a black fringe. Balteres yellow. 



Female. I have not examined the female ; according to the descrip- 

 tions it differs from the male in the same way as the femsde of oculatus. 



Length about 4,7 mm. 



This species is in the male easily known from oculatus by the 

 less extended yellow colour on abdomen and by the quite differently 

 haired front tibiæ and hind femora; both sexes are known by the 

 differently coloured legs and the black postocular bristles. 



D. Hoffmannseggii is very rare in Denmark, only one specimen, a 

 male, has been caught at Laven near Silkeborg in Jutland, in August 

 1881 (H. J. Hansen). 



Geographical distribution: — Northern and middle Europe down 

 into Austria, Hungary and Styria; its northern limit lies in Denmark, 

 and it occurs in England. 



Remarks: Verrall (Entom. Month. Mag. XVI, 1905, 81) expresses 

 the opinion that JD. cyanocepJialus Meig., Hoffmannseggii Meig. and 

 tripilus Loew, may be identical, partly lead by the labelling found 

 in Kowarz' coUection; I can say nothing else about this opinion, than 

 that it seems somewhat probable. 



15* 



