Aphiochaeta. 315 



69. A. subpleuralis Wood. 



1909. Wood, Ent. Month. Mag. 2, XX, 118, 146 {Phom). — 1914. Brues, 

 BuU. Wisc. Nat. Hist. Soc. XII, 133. — ? Phora fulicaria Meig. 1830. Syst. 

 Beschr. VI, 217, 16. 



Male. Frons considerably broader than high, greyish black, dull ; 

 inner bristle of lower row slightly or almost not below the outer and 

 a little nearer to it than to the upper supraantennal ; supraantennal 

 bristles not large, equal or nearly so, the upper as distant as the inner 

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

 of ordinary size, black, arista short-pubescent. Palpi yellow, not 

 large, witli ordinary bristles. Thorax black, slightly shining, with 

 brownish pubescence. Mesopleura with uniform bristles. Abdomen 

 black, distinctly greyish; it has short hairs, slightly longer at the hind 

 margins of the segments and increasing in length backwards; on the 

 sides behind the hairs are longish, and the hindmarginal hairs on 

 sixth segment somewhat long, especially at the sides. Hypopygium 

 somewhat small, grey; on each side it has some small bristly hairs, 

 arranged vertically near the base from below upwards and above 

 continued in a couple of smaller hairs stretching backwards; there 

 is a large, yellowish ventral plate, rounded at the end; anal tube 

 short, but somewhat high, yellow. Legs yellowish brown to brown, 

 the front legs the palest; hind femora with the hairs below the basal 

 half not long, but distinct and fringe-like; bristles on hind tibiæ not 

 large, the dorsal hair-seam deflected anteriorly somewhat suddenly 

 below the middle. Wings more or less brownish tinged, veins brown; 

 costa not reaching to the middle, but rather short, about 0,44 — 0,45, 

 the divisions may vary a little, but can, I think, as an average be 

 given as 12 — 5 — 3; costal cilia full long; angle at fork acute; fourth 

 vein evenly curved in the whole length, a little more in the basal part. 

 Halteres yellow. 



Female. Similar to the male; the dorsal hair-seam on hind tibiæ 

 deflected in the same way. 



Length 1,5 — 2 mm. 



The costa is, as seen, much shorter than given by Wood, and 

 neither do I find it longer in the female, and by no means to the middle 

 as Wood says; I have seen typical specimens from Wood. 



A. subpleuralis is in no way common in Denmark; Holte, 

 Hillerød, Bogø south of Sealand, Lohals on Langeland, on Falster at 

 Marienlyst and in Jutland at Ry (Th. Mortensen, the author); the 

 dates are Ve — ^^U in 1917 to 1921 ; in all about a dozen specimens have 

 been taken. 



