132 
brownish or greyish brown tinged; thin veins rather strong; costa 
short, about 0,44 of the wing-length, costal divisions about as J3 
—6 — 4; angle at fork somewhat acute; costal cilia moderately 
long; fourth vein evenly curved in the whole length. Halteres 
black. — Length 2 mm. 
Holte 1 4 1920 (Th. Mortensen), on a fresh stub ofa tree, one 
male. 
Scutellum with two bristles. 
Mesopleura bristly, with one long bristle. 
Costa long, fringe short. 
2. A. depilata n. sp. J . 
Male. Frons low, twice as broad as high at the sides, grey¬ 
ish black, duil; bristles as in rudis , the bristles of lower row like- 
wise near to each other but the outer placed lower, in nearly the 
same height as the inner and this latter thus less near the margin, 
upper supraantennals still more distant. Antennæ blackish, large, 
third joint oval, reaching above the centre of the eye, arista short- 
pubescent. Palpi yellow, bristles scarcely as long as in rudis. 
Thorax black, a little shining. Mesopleura bristly with one long 
bristle, but not so long as in rudis. Abdomen duil black. Hypopy- 
gium large, knob-shaped, it is black and has hairs below, which 
seem to be placed more densely and bunch-like than in rudis , one 
of them is a little longer and curved inwards; anal tube yellow, 
of medium size; when the subanal body is exposed a very large, 
black polished, hook-like piece is seen tapering into a long, band¬ 
shaped, pointed end, it has also at the base another broader piece. 
Legs yellowish, the posterior slightly darker, the apical half of hind 
femora brownish; front tarsi not stouter than usual; hind femora 
with only short hairs below the basal half, but the hairs on the 
anteroventral margin of the apical part somewhat long and bristly; 
hind tibial cilia distinet but weaker than in rudis. Wings as in 
rudis but more colourless, and thin veins rather fine; 1 distinetly 
longer than 2 —[— 3; costal cilia rather midway between short and 
long; angle at fork large. Halteres black. — Female. Similar; 
antennæ small and the hairs on the apical part of hind femora 
mueh smaller. — Length 1, 3 —1,7 mm. 
