15 Oithorrhapha brachycera. 



have somewhat scarce, yellowish hairs; the anterior femora have a 

 row of fine hairs on the ventral side, the middle femora also a row 

 of strenger hairs on the dorsal side; the anterior tibiæ have rows of 

 not long hairs on various sides; the front tibiæ have some strong 

 bristles on the dorsal side and the middle tibiæ on the dorsal and 

 ventral side, and there are also some long apical spurs; for the rest 

 the anterior legs are clothed with quite short hairs; the anterior tarsi 

 are densely haired with shorter and longer hairs, but there are no 

 such long hairs on the anterior legs as in the tw^o preceding species. 

 The hind femora have three rows of spines below, the posterior row 

 is only present on the basal part; further there is a row on the 

 anterior side; for the rest the hind legs are clothed with shorter and 

 longer hairs, especially there are long, bristle-like hairs on the postero- 

 ventral side of the femora. A separate, short, dense, red pubescence 

 is present on the ventral side of the front tibiæ, at the apex on the 

 postero-ventral side of the hind tibiæ and below the hind tarsi, but 

 there are no spines below the hind tarsi. All the spines and bristles 

 are black, the hairs on the anterior tibiæ brownish to blackish, those 

 on the anterior femora and on the hind legs are paler or darker 

 yellowish to brownish. The wings may vary from quite hyaline to 

 a deep blackish-brown tinge; the veins are brown to dark brown 

 and generally thicker in the strongly tinged wings than in the clear. 

 The stigma is very pale brown to brown. Balteres light yellow. 



Female. Except the differences in the exterior genitalia the female 

 quite agrees with the male, and the hind femora are of the same 

 thickness. 



Length 4—5,5 mm. 



This species resembles to some degree H. grossipes, but it is in 

 the male easily distinguished by the swollen genitalia, the absence 

 of long hairs on the anterior legs and the much thinner hind femora, 

 and in both sexes by the broad not pruinose hind margins to the 

 segments and the yellow thoracic and scutellar bristles. 



H. culiciformis is rather common on the same piaces as the pre- 

 ceding species and together with this ; I once took it also in numbers on a 

 meadow in a wood, sitting on the flowers of grasses; Ordrup Mose, 

 Dyrehaven, Ermelund, Geel Skov, Tyvekrogen, at Slagelse; on Funen 

 at Hoffmansgave and Veflinge, and on Fænø ; in Jutland in Greisdalen 

 and Veile Nørreskow, at Rye and Laven near Silkeborg, at Frijsen- 

 borg, Hald near Viborg, Gjerlev near Randers Fjord and at Sæby; 

 fmally on Bornholm at Rønne. My dates are ^i/v—^r'/., ; it has been 

 taken in copula on ^/s and ^•'/s. I have taken this species with Hilara 

 flavipes , Chironomus sp., and Sciara sp. as prey; the Sciara was 



