24 
Costa short, fringe short. 
27. A. lactipennis n. sp. J'. 
A species near gregctrici Wood but with the frontal bristles 
arranged otherwise and else distinet. 
Male. Frons considerably broader than long, greyish black; 
inner bristle of lower row a little below the outer and mueh in- 
wards to it, about equally distant from it and from the upper supra- 
antennal; the supraantennals unequal, the lower about half as 
strong as the upper; the upper supraantennals rather close-standing, 
more approximated than the inner bristles of the middle row, the 
lower still more close-standing. Antennæ of good size, black, 
arista distinetly pubescent. Palpi yellow, of ordinary size and ar¬ 
mature. Thorax black; mesopleura bare. Scutellum with two brist¬ 
les. Abdomen deep black. Hypopygium small, rather retracted, a 
little greyish; when not quite retracted a thin bristle or long hair 
at each side below is seen; ventral plate short; anal tube minute, 
dusky or blackish. Legs blackish brown, front legs, middle tibiæ 
and posterior tarsi paler; bristles on hind tibiæ fine and delicate. 
Wings whitish or a little milky, thick veins brown, the others 
colourless; costa about 0,4o of the wing*length, costal divisions pro- 
portionately about as 3—1 — 1 ; the inner branch of the fork some- 
what, more or less, steep and thus the angle somewhat large; 
costal cilia short; fourth vein very slightly and evenly curved. 
Halteres black. Length 0,9—1 mm. 
Ry in Jutland and 25 A 1918 (the author); three males: 
they were taken with the net in grass. 
Costa short, fringe long. 
28. A. tibiella n. sp. J' $ . 
A small species near erecta Wood but at once distinet by the 
curious hind tibiæ in the male. 
Male. Frons somewhat broader than long, black, slightly grey¬ 
ish and a little shining; inner bristle of lower row a little below 
the outer and equally distant from it and from the upper supra- 
antennal; supraantennals unequal, the lower somewhat smaller than 
