Aphiochaeta. 361 



107. A. impolluta Schmitz. 



1920. Schmitz, Entom. Meddel XIII, 116, 2. 



Male. This species is very similar to scutellaris. Frons and its 

 bristles as in scutellaris, the lower supraantennals very small. Antennæ 

 blackish brown or blackish, arista more distinctly piibescent. Palpi 

 yellow, ordinary. Tliorax and abdomen mainly coloured as in scutel- 

 laris, though thorax may be withoiit any reddish colouring. Venter 

 yellowish. Hypopygium constructed as in scutellaris. Legs yellow, 

 hind femora dark at apex, with long hairs below the basal half; 

 posterior tarsi simple with last joint shorter than the fourth; bristles 

 on hind tibiæ rather large, larger than in scutellaris, the dorsal hair- 

 seam deflected in the same way. Wings slightly tinged, almost colour- 

 less, veins pale brown, somewhat fme; costa not reaching to the middle, 

 0,46 — 047 of the wång-length, 1 longer than 2 -|- 3; costal cilia perhaps 

 a trifle shorter than in scutellaris; fourth vein indistinct or obliterated 

 at the base, distinctly curved in its first part, for the rest very slightly 

 curved or nearly straight imtil it curves a little upwards at the end. 

 H alteres yellow. 



Female. Similar; hind femora likewise with long or longish 

 hairs below; costa longer, reaching to near the middle. 



Length 1,4 — 2 mm. 



As I have only the female, the above description of the male is 

 mainly taken from Schmitz, and I have seen a typical female spec- 

 imen from him; the species will in the male easily be known from 

 scutellaris by the simple posterior tarsi; in both sexes it will be distin- 

 guished by the dark antennæ, clearer wings and larger hind tibial 

 bristles. 



A. impolluta is rare in Denmark, I possess only two females, 

 Ermehmd Vio 1919 and Tisvilde Vi 1918 (the author). 



Geographical distribution: — Besides from Denmark hitherto 

 only known from Holland. 



108. A. tarsella Lundbk. 



1921. Lundbk. Vidensk. Meddel, fra Dansk natuih. Foren. 72, 139, 11. 



Male. Frons considerably broader than high, blackish grey, 

 dull; inner bristle of lower row slightly below the outer and a little 

 nearer to it than to the upper supraantennal; supraantennal bristles 

 unequal, the lower about half the size of the upper; the upper supra- 

 antennals a little less distant than the inner bristles of middle row. 



