Videnskabelige meddelelser

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Videnskabelige meddelelser

24

Costa short, fringe short.

27. A. lactipennis n. sp. (^ .

A species near gregaria Wood but with the frontal bristles

arranged otherwise and else distinct.

Male. Frons considerably broader than long, greyish black;

inner bristle of lower row a little below the outer and much 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 distinctly 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 ^^/i and ^Vt 1918 (the author); three males:

they were taken with the net in grass.

Costa short, fringe long.

28. A. tibiella n. sp. c? ? •

A small species near erecta Wood but at once distinct 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

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