266 Orlhorrhapha brachycera. 



of its last part, the lower angle of the curve a little angular. Squamulæ 

 pale yellow, with a white fringe. Halteres pale yellow. 



Female. Frons æneous, soinewhat pminose. Epistotna broad, 

 this and the large palpi grey. Antennæ short, the third joint about 



Fig. 83. Antenna of P. crassipes 9. X 5o. 



as long as the two basal, longer than broad; arista not fully twice 

 as long as the antennæ. Legs simple, almost quite yellow, only the 

 front femora a little darkened at the base and the hind femora at 

 the apex above; anterior tarsi darkened towards the end; hind tibiæ 

 more or less darkened towards apex and hind tarsi black. Anterior 

 metatarsi scarcely as long as the four foUowing joints. Front coxæ 

 with no black hairs at the apex, posterior coxæ without tufts of 

 bristles at apex, but with black hairs; fernora quite short-haired, 

 anterior femora with a preapical bristle on each side, hind femora 

 on the anterior side. Wings more tinged than in the male. 



Length 4,8—6 mm. 



P. crassipes is somewhat common in Denmark; Ordrup Mose, 

 Ermelund, Lyngby Mose, at Sørø and at Nyraad near Vordingborg; 

 it has thus only been taken on Sealand. My dates are ^^/o—^'^le. It 

 has been taken on bushes and in low herbage in fens. 



Geographical distribution: — Northern and middle Europe down 

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

 and Siberia. 



Remarks: The females of the three species spinicoxa, elegantula 

 and crassipes are somewhat similar; elegantula is easily known by the 

 brightly shining thorax and more than one preapical bristle on the 

 hind femora; it has the longest third antennal joint of the three 

 species; spinicoxa has darker legs, the third antennal joint is short, 

 almost as broad as long, the arista twice as long as the antennæ; 

 hind femora without preapical bristle; crassipes has the third antennal 

 joint a little longer, and arista not twice as long as the antennæ; the 

 hind femora have one preapical bristle. Also spinicoxa has some 

 black hairs at the apex of the front coxæ, and the middle coxæ 

 mainly dark-haired, while crassipes has no black hairs on the front 

 coxæ, and pale-haired middle coxæ; finally spinicoxa has more 



