8 
yellow with bristles of good size. Thorax black; mesopleura with 
delicate bristles; scutellum with two bristles. Abdomen black. Hy- 
popygium small, black or greyish black, with some small bristles 
on the sides about as in carpalis but situated longer downwards ; 
ventral plate in accordance with the hypopygium rather small, yel- 
lowish, with the end broadly rounded; anal tube small and dark. 
Legs brown, the front legs paler, yellow or brownish yellow; front 
metatarsus dilated but not fully so wide as the end of tibia and 
thus less dilated than in carpalis , the other tarsal joints a little 
stout; the whole tarsus yellowish, last joint darkened; hind femora 
with sparse longish hairs below the basal half; bristles on hind 
tibiæ small, about 11 in number; the hind tibiæ rather short only 
as long as the two first tarsal joints or not much longer. Wings 
clear or almost hyaline, thick veins brown the others pale; costa 
0,45 of the wing-length, costal divisions proportionately about as 
g — 4 — 2 ; costal cilia long; fourth vein evenly curved. Halteres 
black. Length 1,3 mm. 
Holte 3 % 1918 (Th. Mortensen), Bogø south of Sealand 19 /7 
and 3 /8 1917 (the author); three males. 
Female. I possess a female taken in Ermelund 31 /5 1918 which 
may belong here; it agrees well but the front tarsi are simple; 
the wings are clear but a little darker than in the male. 
9. A. subconvexa n. sp. . 
Belonging to the same group as the foregoing. 
Male. Frons greyish black, somewhat broader than long; brist¬ 
les strong, inner bristle of lower row slightly below the outer and 
much nearer to it than to the upper supraantennal; supraantennal 
bristles large, the upper placed a little nearer together than the 
inner bristles of the middle row, the lower only a little weaker 
than the upper and a little more approximated. Antennæ of or- 
dinary size, black, arista distinctly pubescent. Palpi dark yellow 
with somewhat long bristles. Thorax black, slightly shining; meso¬ 
pleura with small bristles. Scutellum with two bristles. Abdomen 
black. Hypopygium small, produced a little downwards and thus 
higher than long, with about three quite small bristles or bristly 
hairs on each side, placed in an oblique line from near the lower 
