Aphiochaeta. 



401 



hind margins of tlie segments, a little longer at the hind margin of 

 sixth segment. Hypopygium small, with short hairs on the sides; 

 ventral plate large, dusky yellowish to blackish; anal tube quite short, 

 but high, blackish. Legs black or brownish black, the front legs paler; 

 hind femora somewhat broad, the hairs below the basal half lonsish; 

 bristles on hind tibiæ somewhat strong, especially six to eight bristles 

 in the lower two thirds. Wings a little yellowish or greyish yellow 

 tinged, sometimes more brownish; thick veins dark brown or blackish, 



Fig. 119. Wing of A. brevicostalis ^. 



the others brown; the thick veins not strong, but relatively fme; 

 costa about 0,40 of the wing-length, costal divisions about as 8 — 4 — 3 

 angle at fork not small; costal cilia short, though not very short; 

 fourth vein slightly and evenly curved, especially in its first part. 

 Halteres yellow, the peduncle dark or black. 



Female. In all respects similar to the male. 



Length 1 — 1,6 mm. 



A. brevicostalis is very common in Denmark all over the country 

 in suitable localities. Wood mentions it as common on flowers of 

 Angelica, I have taken it with the net in low herbage in woods, often 

 especially in grass, and also outside woods in open piaces, and once 

 I took it on fresh, somewhat exsudating stubs of Acer; my dates are 

 ^Vs — V9 in 1910 to 1921. Some specimens came in February and 

 March from shells of Helix, collected in winter. 



Geographical distribution: — Hitherto known from Denmark, 

 England and, according to a specimen sent from Pater Schmitz, 

 from Holland, and also occurring in Prussia (Schmitz, Tijdschr. v. 

 Entom. LXIV, 1921, 2). 



Remarks: The three species angelicae, tarsalis and brevicostalis 

 are rather similar, but well distinguished ; tarsalis is in the male easily 

 known by the thickened front tarsi; in the female this character is 

 also present, but to a smaller degree, but it may be known from ange- 



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