436 Tachinidae. 



grey; frontal stripe velvet black. Vibrissæ ascending to the frontal 

 bristles, strong. Orbits and jowls black-haired. Occiput bluish grey, 

 wdth black liairs, and brown hairs only below in the middle. Eyes 

 with pale yellow hairs. Antennæ black, third joint somewhat broad; 

 arista somewhat short, thickened in more than basal half. Palpi 

 black. Thorax black, bluish grey pruinose, especially on front part, 

 and here with four stripes, the median narrow, the lateral broad. 

 Thorax somewhat sparingly black-haired. Abdomen conical, black 

 and shining, strongly black-haired and with numerous strong bristles, 

 second, third and fourth segment with a pair of discai and a row of 

 marginal bristles, and fifth quite covered with bristles; besides some 

 discai hairs are strong and bristle-like. Genitaha small; iipper forceps 

 cleft to near middle in two pointed branches. Legs black. Wings very 

 slightly tinged; veins black. Squamulæ white. Halteres brownish. 



Female. I do not know the female. 



Length 7 mm. 



P. unicolor is very rare in Denmark, I have taken only one 

 specimen, a male, at Jyderup on ^/^ 1925. It is known as bred from 

 Croesus septentrionalis. 



Geographical distribution: — Europe and down into North 

 Africa; towards the north to middle Sweden. 



103. GepmaPia R. D. 



Species of somewhat large to smallish size and of black colour 

 with some whitish pruinosity. Head a little broader than thorax, 

 more or less convex behind and somewhat puffed out especially below; 

 epistoma somewhat or strongly retreating, the head more or less 

 triangular in profile, higher than long. Frons very broad, and equal 

 in both sexes, only a little declining, but rather or much protruding. 

 Cheeks broad or very broad and jowls from half as broad to even 

 as broad as the eye is high. In both sexes ocellar and inner and outer 

 vertical bristles; two orbitals likewise in both sexes or only in female; 

 the ocellar bristles directed outwards. Postocellar and occipital 

 bristles relatively strong. No black hairs behind postocular bristles. 

 Frontal bristles descending to end of second antennal joint or to 

 insertion of arista, one or a couple of the uppermost directed out- 

 wards in both sexes; orbits besides with some more or less bristly 

 hairs. Cheeks bare. Vibrissæ ascending about to or a little above the 

 middle, they are short or longer. Eyes bare. Epistoma slightly reflected 



