362 Phoridae. 



the lower a little more approximate. Antennæ smallish, blackish 

 brown, arista long, distinctly pubescent. Palpi yellow, of ordinary 

 size and armature. Thorax black, slightly shining, with brownish 

 pubescence. Pleura brownish anteriorly. Mesopleura bare. Abdomen 

 black, slightly greyish, dull, the short hairs slightly longer at the hind 

 margins of the segments, longest on sixth segment. Hypopygiiim of 

 medium size, brownish grey, with distinct hairs behind and on the 

 sides; there is a broad, yellow ventral plate, roimded at the end; 

 anal tube short, but high, yellow. Legs yellowish, the posterior legs 

 more brownish yellow, hind femora darkest towards the end, with 

 long hairs below the basal half; front tarsi somewhat stout, especially 

 the three first joints; britsies on hind tibiæ distinct, but rather small 

 and numerous; the dorsal hair-seam curving evenly towards the 

 anterior from above the middle. Wings a little yellowish tinged, 

 veins brown or pale brown; costa reaching to the middle, costal 

 divisions about as 11 — 6 — 3, thus 1 a little longer than 2+3; costal 

 cilia full long; angle at fork somewhat acute; fourth vein evenly 

 curved in the whole length, only slightly more in its basal part and 

 slightly S-like at the base. Halteres yellow. 



Female. Similar; front tarsi likewise stoutish and hind femora 

 with long hairs below. 



Length 1,2 — 1,7 mm. 



This species will be known in the group especially by the stout 

 front tarsi and the small size. 



A. tarsella is rare; Ermelund ^^U 1921 and in Jutland at Ry on 

 ^/t — ^V? 1918; in all three males and four females. 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



109. A. crassicosta Strobl. 



1892. Strobl, Wien. Ent. Zeitg. XI, 194 et 1894. Mittheil. Verein. Steierm, 

 1893, XXX, 14 (Phora). — Phora costalis Strobl, 1910. Mittheil. Verein. Steierm. 

 XL VI, 121 p. p. var. crassicosta. 



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

 inner bristle of lower row in the same height as the outer or a little 

 lower and nearer to it than to the upper supraantennal; supraantennal 

 bristles unequal, the lower half the size of the upper or more; the 

 upper supraantennals not as distant as the inner bristles of middle 

 row, the lower a little more approximate. Antennæ small, blackish, 

 arista distinctly pubescent. Palpi of ordinary size and armature. 



