Videnskabelige meddelelser

Videnskabelige meddelelser


the same distance from each other as the inner bristles of the

middle row or slightly more approximated, and the lower pair al-

most not more approximated than the upper. Antennæ black,

rather large, in profil reaching to the middle of the eye, arista

very short pubescent. Palpi black, somewhat large, with long

bristles. Thorax black; mesopleura bristly, the bristles of uniform

size. Scutellum with two bristles. Abdomen black, the hairs at the

hind margin of sixth segment distinct but not long, only at the

sides longer. Hypopygium small, black, shining above at the very

base; there are no bristles but downwards on the sides there are

short, somewhat dense hairs and at the basal corners a little longer

hairs; ventral plate dusky yellow, short, triangularly rounded ; anal

tube of medium size, deep black. Legs quite black, only front

tibiæ and tarsi a little paler; front tarsi not really thickened but

distinctly stout, the three last joints as broad as long; the pulvilli

somewhat large; hind femora on the basal half below with a fringe

of somewhat short but rather dense and strong bristles, shortest

but strongest towards the base ;

bristles on hind tibiæ distinct, but

relatively small. Wings somewhat brownish tinged, veins dark

brown to black, thick veins rather strong and also the thin veins

somewhat strong, seventh vein nearly as strong as the others

angle at fork not small; costa well beyond middle, costal divisions

proportionately about as 15 — 10 — 4; costal cilia long; fourth vein

evenly and not much curved at the base and for ihe rest nearly

straight. Halteres black. — Female. Similar to the male, antennæ

smaller, front tarsi a little less stout; hind femora withouth fringe.

Length 1,8 to fully 2 mm.

Geel Skov 'Vi— Vo 1915 (Th. Mortensen, the author), on fresh

somewhat exsudating stubs of Acer; one male and eight females.

15. A. hypopygialis n. sp. c/"-

This interesting species belongs to the group with siibpleuralis

Wood, but it is at once distinguished alone by its hypopygium.

Male. Frons greyish black, rather broad but not twice as

broad as long; bristles strong, inner bristle of the lower row about

in the same height as the outer and nearer to it than to the upper

supraantennal, these six bristles forming a nearly straight trans-