14 
verse row; supraantennal bristles unequal, the lower pair not more 
than half as strong as the upper; upper supraantennals as distant 
as the inner bristles of the middle row, the lower pair slightly 
more approximated. Antennæ black, of ordinary size, arista dis¬ 
ti netly pubescent. Palpi dark yellow, of ordinary size and arma¬ 
ture. Thorax black; mesopleura bristly, the bristles uniform in 
size. Abdomen somewhat robust, black, somewhat greyish above; 
the hairs on the sides of the sixth segment longish especially at 
the hind margin. Hypopygium somewhat large and knob-like, about 
as high as long; it is shining above at the base, greyish, but on 
the sides the lower half is pale yellow; as far as I could judge 
from my sole specimen there is on each side a row of about six 
not strong bristles stretching in an oblique or arched line from 
near the lower anterior corner upwards and backwards and some 
bristly hairs more anteriorly towards above; the bristles in the 
row inerease in size downwards, the lowermost being the strong- 
est; further there is on the right side below just at the margin 
of the apical aperture a bunch or series of erect hairs; ventral 
plate yellow, large and square; anal tube of medium size, blackish, 
without apical hairs (rubbed?). Legs dark brown, the front legs 
paler and also posterior tibiæ and tarsi somewhat paler, the last 
joint on all tarsi black; the hairs below the basal part of hind 
femora a little longish towards the middle; bristles on hind tibiæ 
somewhat large, few in number, about 10 or 11. Wings clear, 
thick veins blackish brown, thin veins paler; costa not reaching 
to the middle, about 0,46 of the wing-length, costal divisions pro- 
portionately about as 11—8 — 3; costal cilia long; fourth vein rather 
curved at the origin and then almost straight. Halteres yellow. 
Length 1,7 mm. 
Suserup Skov at Sorø (Th. Mortensen); one male. 
16. A. indifferens n. sp. r?. 
A species near subpleuralis Wood but with unequal supra¬ 
antennals and another hypopygium. 
Male. Frons black, slightly greyish, broader than long; bristles 
strong, inner bristle of lower row a little below the outer and 
nearer to it than to the upper supraantennal; upper supraantennals 
