21 
bristles of the middle row, and the lower direct under them, 
not more approximated (in one female specimen the upper supra- 
antennals are a little more distant than the lower). Antennæ small, 
black or brownish black, arista distinctly pubescent. Palpi dark 
yellow, of ordinary size and armature. Thorax black; mesopleura 
bristly, the bristles uniform. Scutellum with two bristles. Abdomen 
black. Hypopygium small and withdrawn, there is a couple of 
small bristles downwards on the sides; ventral plate yellowish, 
flap-like, rounded at the end; anal tube small, dirty yellowish. 
Legs brownish, the front legs paler; the front tarsi somewhat stout, 
metatarsus only little narrower than tibia, the other joints more 
siender; hind femora with long hairs below the basalpart; brist¬ 
les on hind tibiæ distinet though not large, about 12 in number. 
Wings white, a little milky; thick veins brown, the others colour- 
less; costa 0 , 4 o of the wing-length, costal divisions proportionately 
as 9—4—3; costal cilia long; fourth vein evenly curved. Halteres 
black. — Female. Similar, front tarsi of the same shape and the 
hairs below hind femora likewise long. Length 1,2 —1,5 mm. 
Bogø south of Sealand 10 h — 3 % 1917 (the author); one male 
and two females. 
24. A. bvevipes n. sp. £. 
A species near superciliata Wood but at once distinguished by 
its short, robust legs. 
Male. Frons somewhat broader than long, greyish black; inner 
bristle of lower row below the outer and a little nearer to it than 
to the upper supraantennal; the supraantennals a little unequal, 
the lower somewhat smaller than the upper; the upper supraanten¬ 
nals in about the same distance from each other as the inner 
bristles of the middle row, the lower pair more approximated and 
near up to the upper. Antennæ of ordinary size, brownish black, 
arista pubescent. Palpi yellow, of ordinary size and armature. 
Thorax black; mesopleura bristly, the bristles uniform. Scutellum 
with two bristles. Abdomen a. little robust, black, greyish above, 
the hairs at the hind margin of sixth segment longish. Hypopygium 
small, greyish, with a nearly vertical series of bristly hairs on 
each side; ventral plate dusky yellowish, small, nearly square; 
