139 
Holte -%5 1917 (Th. Mortensen), one male. 
This species will in the group at once be known by its pale 
colour, but it is possible that the female will show four scutellar 
bristles. 
Costa long, fringe long. 
Bristles on hind tibiæ distinet. 
11. A. tarsella n. sp. $ . 
Male. Frons considerably broader than high, blackish grey, 
duli; inner bristle of lower row slightly below the outer and a 
little nearer to it than to the upper suprantennal; supraantennals 
unequal, the lower about half the size of the upper; the upper 
supraantennals a little less distant than the inner bristles of middle 
row, the lower a little more approximated. Antennæ smallish, black¬ 
ish brown, arista long, distinetly pubescent. Palpi yellow. Thorax 
black, slightly shining. Mesopleura bare. Abdomen black, slightly 
greyish, duli. Hypopygium of medium size, brownish grey, with 
distinet hairs behind and on the sides; anal tube quite short but 
high, yellow. Legs yellowish, the posterior more brownish yellow, 
hind femora darkest towards the end, with long hairs below the 
basal half; front tarsi somewhat stout, especially the three first 
joints, metatarsus not longer than the two following joints, bristles 
on hind tibiæ distinet, but rather small and numerous, the dorsal 
hair-seam curving evenly towards the anterior from above the middle. 
Wings a little yellowish tinged, costa reaching to the middle; costal 
divisions about as 11—6—3, thus 1 a little longer than 2 j 3 , 
costal cilia full long, angle at fork somewhat acute; fourth vein 
evenly curved in the whole length only slightly more in the basal 
part and slightly s-like at base. Halteres yellow. — Female. Sim- 
ilar; front tarsi likewise stoutish and hind femora with long hairs 
below. — Length 1,2—1,7 mm. 
Ry in Jutland 8 A — 28 /7 1918 (the author), two males and four 
females. 
The species will be known in the group especially by the stout 
front tarsi and the small size. 
1 2. A. melaena n. sp. J' • 
Frons not mueh broader than high, black, duli; inner bristle 
of lower row slightly below the outer and slightly nearer to it than 
