29 
divisions proportionately about as 11—3—3; angle at fork some- 
what acute; costal cilia long; fourth vein almost straight in its first 
part, curved upwards towards the end and a little recurved at apex. 
Halteres yellow. Length 1,7 mm. 
Copenhagen 13 /e 1919 (the author); one male taken on a 
window. 
33. A. cinevella n. sp. tf . 
A species near exigua Wood but with dusky palpi, blackish 
legs and a shorter costa. 
Male. Frons somewhat broader than long, black, slightlv grey- 
ish; bristles strong, inner bristle of lower row slightly below the 
outer and equally distant from it and from the upper supraantennal; 
supraantennals unequal, the lower pair scarcely half as large as 
the upper; the upper supraantennals equally distant with the inner 
bristles of the middle row, the lower more approximated. Antennæ 
of ordinary size, black, arista almost bare. Palpi more or less 
dusky to nearly blackish, of ordinary size and armature. Thorax 
black, very slightly shining; mesopleura bare. Scutellum with two 
bristles. Abdomen black, distinctly greyish tinged. Hypopygium 
small, greyish, only with short hairs; ventral plate indistinguish- 
able; anal tube small, brownish or dusky yellow with a yellow 
apex. Legs blackish or blackish brown; hind femora with some 
sparse longish hairs below on the basal part; hind tibiæ with dis¬ 
tinet but small bristles. Wings nearly clear or very slightly yel- 
lowish, veins brown to blackish brown; costa 0,36 of the wing-length, 
costal divisions proportionately about as 11— 3 V 2 —3; costal cilia 
long but not specially long; fourth vein evenly curved especially 
at both ends. Halteres yellow. Length 1 , 4 — 1,7 mm. 
Holte 2 %— 12 /8 1918 (Th. Mortensen); a number of specimens, 
all males. 
34. A. laeta n. sp. J . 
A species near the foregoing but with yellow legs and quite 
another shape of the hypopygium. 
Male. Frons considerably broader than long, greyish; bristles 
strong, inner bristle of lower row slightly below the outer and 
slightly nearer to it than to the upper supraantennal; supraanten- 
