Aphiochaeta. 257 



21. A. breviseta Wood. 



1912. Wood. Ent. Month. Mag. 2, XXIII, 99. — 1914. Briies, Bull. Wisc. 

 Nat. Hist. Soc. XII, 114. — 1918. Schmitz, Jaarb. Natuurh. Genootsch. Lim- 

 burg 1917, 145. 



Male. Frons broader than high, black, a little greyish, duU; 

 inner bristle of lower row slightly below the outer and placed in the 

 middle between it and the iipper supraantennal ; supraantennal 

 bristles unequal, the lower scarcely half the size of the iipper; the 

 upper supraantennals approximate, a little nearer together than the 

 inner bristles of middle row, the lower a little more approximate. 

 Antennæ somewhat large, black, arista short, about as long as the 

 frons, distinctly pubescent. Palpi yellow, of ordinary size, the bristles 

 not long. Thorax black, slightly shining, with dark brown pubescence. 

 Scutellum with four equal and about equally distant bristles. Meso- 

 pleura bare. Abdomen black, dull, a little greyish; the short hairs 

 almost not longer at the hind margins of the segments, but on sixth 

 segment somewhat long. Hypopygium small, greyish black, with 

 some hairs below on the sides ; there is a large, brownish yellow ventral 

 plate, rounded at the end; anal tube short, yellowish, blackish at the 

 base. Legs brown or dark brown, the front legs slightly paler; hind 

 femora somewhat broad, with long hairs below the basal half; the 

 hairs on the antero ventral side at apex somewhat strong; bristles 

 on hind tibiæ rather large, especially about the middle, the upper 

 smaller. Wings nearly clear, veins brown; costa not reaching quite 

 to the middle, 1 a httle longer than 2 + 3 (equal to 2 + 3 after Wood 

 and Schmitz); costal cilia long, but not specially long; fourth vein 

 somewhat curved in its first part, for the rest slightly curved. H alteres 

 yellow. 



Female. Wood knew only the male, but Schmitz also mentions 

 the female; according to his description, it agrees with the male, but 

 the frons is less broad, the antennæ smaller, costa a little longer, and 

 1 relatively longer. 



Length 1,7 — 2 mm. 



A. breviseta is very rare in Denmark, only one specimen, a male, 

 has been taken, Lohals on Langeland ^^/t 1920 (the author). 



Geographical distribution: — Besides from Denmark known from 

 England and Holland, but rare. 



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