15 
more approximated than the inner bristles of the middle row, lower 
supraantennals small, not half as strong as the upper and not 
more approximated. Antennæ black, perhaps a little below ordinary 
size; arista distinctly pubescent. Palpi yellow, ordinary. Thorax 
black; mesopleura bristly, the bristles uniform. Scutellum with 
two bristles. Abdomen black, only slightly greyish. Hypopygium 
small, a little higher than long, without bristles; ventral plate yel¬ 
low, broad and nearly square ; anal tube small and short, dusky, 
palest at apex. Legs brown, front legs paler, especially tibiæ and 
tarsi; bristles on hind tibiæ delicate and numerous. Wings some- 
what strongly brown, veins brown and strong, seventh vein dis¬ 
tinctly weaker; costa not to the middle, about 0 , 4 « of the wing- 
length, costal divisions nearly as in subpleuralis and proportionately 
about as 16—7—4; fork longish and the angle somewhat acute; 
costal cilia long; fourth vein a little curved at the origin, for the 
rest slightly curved. Halteres yellow, a little infuscated. Length 2 mm. 
Ry in Jutland 19 A 1918 (the author); one male. 
17. A. angustipennis n. sp. tf $. 
A species near the foregoing but much smaller and more siender, 
with about equal supraantennals and a little larger bristles on hind 
tibiæ. 
Male. Frons greyish black, broader than long; bristles strong, 
inner bristle of lower row nearly in the same height as the outer 
and a little nearer to it than to the upper supraantennal, these 
six bristles placed in a nearly straight transverse line; upper supra¬ 
antennals distinctly more approximated than the inner bristles of 
the middle row, the lower supraantennals about as long but weaker 
than the upper ones, placed somewhat low down and more approx¬ 
imated. Antennæ somewhat small, black, arista distinctly pube¬ 
scent. Palpi yellow or dark yellow, of ordinary size, with long 
i _ 
bristles. Thorax black; mesopleura bristly, the bristles equal. 
Scutellum with two bristles. Abdomen black, somewhat siender 
and ta'pering, the hairs at the hind margin of sixth segment some¬ 
what long at the sides. Hypopygium small, higher than long, with¬ 
out bristles; ventral plate dusky yellow; anal tube small, brown 
or blackish. Legs yellowish brown; bristles on hind tibiæ distinet 
