222 Orthorrhapha brachycera. 



apex; front tibiæ with one bristle above; middle tibiæ wilh two 

 distinct antero-dorsal, and one or two very small porstero-dorsal 

 bristles; hind tibiæ with two dorsal rows of bristles, and a short but 

 distinct ciliation on the anterior side, not distinct on the tarsi. Wings 

 slightly greyish tinged, somewhat bluish iridescent; veins blackish. 

 Squamulæ yellow, with a brownish or somewhat yellowish fringe. 

 Halteres yellow. 



Female. Epistoma somewhat broad, light grey. Paipi a little 

 larger than in the male, greyish, paler at the tip. The apex of the 

 anterior femora may be a little more broadly yellow than in the 

 male; hind tibiæ quite yellow, and hind metatarsi with only the 

 apex dark. 



Length 1,8—2 mm. 



C. microcerus is very rare in Denmark, we have only three speci- 

 mens, two males and a female; the two specimens are from earlier 

 time, probably taken at Ordrup, the third was taken at Nebsager south 

 of Horsens in July (H. J. Hansen). 



Geographical distribution: — Northern and middle Europe down 

 into Germany, Poland and Bohemia ; its northern limit is in Denmark, 

 and it occurs in England. 



11. I>iapliorus Meig. 



This genus is in many respect similar to Chrysotus, but the 

 species are as a rule of a somewhat more elongated and slender 

 shape, and with longer legs and broader wings. The species are of 

 small to medium size, of metallic or of dark, slightly metallic colours; 

 sometimes the males have the abdomen yellowish at the base. Head 

 as broad as or slightly broader than thorax, generally broadest in the 

 female, short, semiglobular. Eyes large, oval, narrowed downwards 

 densely short-haired ; they are generally meeting on the frons above 

 the antennæ in the male (and this is the only genus of DoHchopodids 

 in which this feature occurs), separated in the female; but sometimes 

 (in non Danish species) the eyes are more or less separated on the 

 frons in the male, the frons being from very narrow to rather broad, 

 even broader than the epistoma; below the antennæ the eyes are 

 separated in both sexes, broadest in the female. The vertex is not 

 excavated, in the males with touching eyes the small vertical triangle is 

 prominent; in these males there are a pair of ocellar and a pair 

 of smaller postvertical bristles, but no vertical bristles; the females on 

 the contrary have outer vertical bristles as usual. (How the case is 

 in the males with a broad frons I do not know, according to Loew's 



J 



