Aphiochaeta. 327 



the upper not approximate, at or at about the same distance from 

 each other as the inner bristles of middle row, but sometimes more 

 distant, the lower supraantennals well below the upper and approxi- 

 mate. Antennæ a little large, black or brownish black, arista not long, 

 distinctly but short-pubescent. Palpi somewhat small, yellow, with 

 ordinary bristles. Thorax black, a little shining, with dark brownish 

 pubescence. Mesopleura with small, uniform bristles. Abdomen black, 

 dull, generally with narrow, more or less distinct paler hind margins 

 to the segments; hairs almost not visible, only a little longer on sixth 

 segment. Hypopygium black, when fully exposed rather long or more 

 correctly high as the side parts are produced downwards, ending in a 

 point; at the lower margin there is a row of strong hairs ending at 

 each lower corner with a bunch of smaller hairs; when the hypopy- 

 gium is not quite exposed only the bunches at the corners are seen, 

 which is generally the case; ventral plate small, yellowish; anal tube 

 somewhat long, thin at the base, black. Legs brownish yellow to dark 

 brown; front tarsi a little thickened, metatarsus not longer than the 

 two following joints; the hairs below hind femora short; hind tibial 

 bristles quite small and numerous. Wings nearly clear, slightly 

 yellowish, veins dark brown; costa about 0,39 of the wing-length, 

 costal divisions about as 7 — 3 — 2; costal cilia short; fourth vein 

 slightly and evenly curved, indistinct or interrupted at the base. 

 Halteres black or blackish. 



Female. Quite similar to the male; front tarsi likewise a little 

 strong. 



Length 1 — 1,2 mm. 



Remarks: The variety mentioned by Wood 1. c. 198 with the 

 hypopygium of another shape I have never seen, all my numerous 

 specimens are quite typical ; I think it doubtful that the variety 

 really belongs to this species; on the other hånd, I possess a female 

 with rather pale halteres. — The upper supraantennals, as seen in 

 my description, are in no way always wider apart than the inner 

 bristles of middle row, as stated by Wood. 



A. latijrons is common in Denmark; Ermelund, Holte, Hillerød, 

 Suserup Skov at Sorø, Stensby Skov in South Sealand, Bogø south 

 of Sealand, Lohals on Langeland and in Jutland at Hejls south of 

 Kolding, Jelling, Ry and in Egense Skov at the east end of Lim- 

 fjorden (Th. Mortensen, the author); the dates are ^Ve — Vs in 1917 

 to 1921. I have taken it, and often numerously, with the net in low 

 herbage in woods, not rarely in localities with spruce and fir; at Hejls 



