32 
long; fourth vein considerably curved at the base. Halteres black. 
Length 1,7 mm. 
Holte 25 /e 1917 (Th. Mortensen); one male. 
This species is evidently related to discreta Wood and nudi- 
ventris Wood but at once distinguished by the row of bristles on 
front tibiæ and the hypopygium. 
37. A. vubicunda n. sp. tf . 
Male. Frons somewhat broader than long, black, slightly grev- 
ish; bristles very strong, inner bristle of lower row a little below 
the outer and nearer to it than to the upper supraantennal; supra- 
antennals unequal, the lower pair small, not half as large as the 
upper; upper supraantennals very close-standing, much more approx- 
imated than the inner bristles of the middle row, lower supra¬ 
antennals still a little doser together. Antennæ somewhat small, 
black, arista somewhat long, distinctly pubescent. Palpi yellow, 
dusky towards the base; they are somewhat narrow, the bristles 
of usual size. Thorax reddish or brownish red, darkest above, 
palest on the humeri; the pleura with some darkenings; meso- 
pleura bare. Scutellum with two bristles. Abdomen robust, yellowish 
red, first segment like the postnotum greyish. Hypopygium quite 
small and withdrawn so that only the lower part is seen which is 
blackish grey and has fine hairs; ventral plate yellow, rounded; 
anal tube small, yellow. Legs yellow, tarsi a little more brownish; 
hind femora rather broad, the hairs below the basal part distinet 
but not long; bristles on hind tibiæ very small and numerous. 
Wings brown, veins brownish yellow, strong, costa thick, in reality 
a little. swollen; it reaches a little beyond the middle, the costal 
divisions proportionately about as 18—11—6, thus 1 about equal 
2 -f- 3 and 2 about double 3; fork a little longish; costal cilia 
moderately long; fourth vein a little s-like at base and curved in 
its first part, for the rest quite straight. Halteres pale yellow. 
Length 2,4 mm. 
Holte 19 /8 1917 (Th. Mortensen); one male. 
This interesting species cannot be confused with any other 
of the group. 
