140 Orthorrhapha brachycera. 



brownish pruinose, trochanters, apex of femora and tibiæ, and the 

 tarsi except the very base black or blackish. Femora with rows of 

 short, strong bristles below; tibiæ with rows of similar bristles dors- 

 ally; tarsi somewhat spinulous beneath, and with bristles at the apex 

 of the joints; front and hind tarsi with a short, dense, erect pubes- 

 cence beneath, the middle tarsi with ordinary ciliation. All bristles 

 black, and the legs for the rest black-haired. Wings somewhat 

 brownish tinged, Vein brown; the lower branch of the cubital fork 

 bent somewhat downwards, the apex curved very slightly upwards, 

 terminating somewhat before the apex of the wing. Stigma very 

 faint. Halteres pale yellow. 



Female. Frons broad, brownish, Abdomen not pruinose on the 

 sixth and seventh segment, but the grey side spots dilated inwards 

 at the front margin of the segments, there is thus, besides the grey 

 base of the abdomen, a narrow band at the front margin of the 

 third segment, and more or less distinct lateral bands on the following 

 segments, The lamellæ of the ovipositor short. Legs haired about 

 as in the male; the hairs of the short ciliation on the postero-ventral 

 side of the posterior femora may be slightly broadened, but the legs 

 cannot at all be termed pennate. 



Length 7 — 8 mm. 



E. opaca is very rare in Denmark, only four specimens, a male 

 and three females, have been caught, in 1906 and 1907, and all in 

 Jutland; Ringkøbing (Th, Mortensen), Silkeborg (A. Petersen); the 

 dates are ^^'5 and ^'o, 



Geographical distribution:— Europe down into Italy; its northern 

 limit lies in Denmark, and it occurs also in England. 



Remarks: Retween the species oiEmpis s, str. this species points 

 somewhat towards the subgenus PohjUepharis fiezzi, 



6. Hilara Meig. 



Species of small, at most of medium size, generally of dark, 

 blackish, brownish or greyish colour, sometimes lighter grey or brown, 

 and also sometimes yellow. The head is about as broad as or a 

 little narrower than the thorax; it is about globular, but however 

 shorter than high; it is somewhat arched behind and here more or 

 less densely clothed with hairs, which may be somewhat bristly. The 

 eyes are rather large ; they are nearly always separated in both sexes 

 with the frons of the same or almost the same breadth, but some- 

 times the frons in the male is to a higher or lower degree narrower 

 than in the female; only very rarely [flavipes and gracilipes) the eyes 

 are touching in the male. In the latter case the facets are in the 



