137 
middle row, the lower direct below the upper, not or at least very 
slightly nearer together. Antennæ black, arista distinctly pubescent. 
Palpi yellow. Thorax black, a little greyish and slightly shining. 
Mesopleura with uniform bristles. Abdomen somewhat robust, rather 
grey, duli. Hypopygium somewhat small, higher than long, greyish, 
shining at the base above; the lower hinder corners drawn a little 
out; on each side there are some small bristly hairs; anal tube 
short, yellow, darker at the base. Legs yellowish or light brownish 
yellow, hind femora with the apical part darkened and likewise hind 
tibiæ; hind femora somewhat short and broad, only reaching slightly 
beyond the end of abdomen, below the basal half there is a con- 
spicuous fringe of somewhat short but strong, a little curved hairs, 
they are quite short at the base, longer outwards, and the fringe 
ends with a couple of finer hairs; bristles on hind tibiæ somewhat 
large and not numerous (about 10). Wings somewhat brownish 
tinged and thin veins somewhat strong; costa not quite to the 
middle, about 0,48 of the wing-length, costal divisions about as 5 
— 4—2; costal cilia full long, fourth vein evenly curved in the 
whole length, only slightly more at the origin. Halteres yellow. — 
Length 1,8 mm. 
Lohals on Langeland 7 A 1920 (the author), one male. 
Mesopleura bare. 
Costa long, fringe short. 
9. A. merochaeta n. sp. . 
Frons somewhat broader than high, slightly greyish, duli or 
nearly; inner bristle of lower row below the outer and only slightly 
nearer to it than to the upper supraantennal; supraantennals un- 
equal, the lower about half the size of the upper; upper supra¬ 
antennals nearer together than the inner bristles of the middle 
row, the lower only very slightly more approximated. Antennæ 
somewhat large, black, arista short-pubescent. Palpi black. Thorax 
black, somewhat shining. Mesopleura bare. Abdomen robust, black, 
somewhat greyish and duli; at the hind margin of sixth segment 
the hairs a little longish and on the ventral side strong and 
bristly. Hypopygium of medium size, black; it is somewhat curious 
but on my sole specimen I cannot study it satisfactorily; it is 
