24 Platypezidae. 



aiithor evidently knew the males of these two species, while this 

 sex was unknown to Zetterstedt. 



5. Platypeza Meig. 



Small species, generally velvet black in male, rarely paler, but 

 as a rille difTerently coloured in female, greyish with black markings. 

 Head broader than thorax and broader than high, flat behind or 

 here somewhat convex below. Eyes in male large, touching for a 

 long space, the inner eye-margin then bending suddenly or more 

 evenly outwards, and accordingly the frons more or less broad, 

 sometimes very broad; in rare cases frons quite small (furcata). The 

 inner eye-margin has a larger or smaller incision at the height of the 

 antennæ. According to the diverging of the inner eye-margins the 

 face is broader or narrower, from rather broad to about quadratic. 

 In the female the eyes are smaller, broadly separated, with about 

 parallel inner margins. In the male the facets in about upper half 

 are enlarged. On the ocellar triangle there is a number of hairs, but 

 no individualised ocellar bristles; along the hinder eye-margin a 

 row of short to rather long postocular hairs. The frons is bare in 

 male or only with few minute hairs at top, in a single case with a 

 tuft of hairs; in the female the frons has more or fewer minute hairs 

 about all over, or it is almost bare. No vertical bristles present. Jowls 

 not or almost not descending. The antennæ inserted near to each 

 other, at or somewhat below the middle of the head; the basal joints 

 are small, the third also rather small, nearly semicircular, with an 

 apical arista with two distinct basal joints; the second antennal 

 joint has small apical hairs, sometimes more or fewer bristly hairs 

 above in male, the third joint is pubescent, the arista apparently 

 bare. Face rather low; epistoma more or less marked ofT from the 

 cheeks by a furrow, and the cheeks broader or narrower, generally 

 broad. Jowls and cheeks more or less hairy, or the cheeks and some- 

 times also jowls bare; sometimes also epistoma has hairs. Mouth 

 parts small and retracted. Below epistoma there is a variously shaped, 

 sometimes somewhat horse-shoe-shaped part which seems to be 

 clypeus and to be somewhat separate from epistoma, (after Becher: 

 Denkschr. Kais. Akad. Wiss. Wien XLV, 1882, 31, Taf. III, Fig. 25, 

 it would seem as if no separated clypeus is present). Labrum short, 

 conical and somewhat semitubular; hypopharynx still shorter, 



