98 Oithorrhapha brachycera. 



segments ; at the hind margin of the sixth segment there is a similar, 

 silverwhite band, divided in the middle. Venter black haired. Legs 

 black or brownish black; the hairs, both the scaly and the other 

 ones, as well as the bristles, black; the scaly hairs on some piaces 

 with a more or less whitish reflex. Wings brownish black, only clear 

 at the apex and partly at the hind margin ; the border of the blackish 



Fig. 34. Wing of A. anthrax. 



part goes about from the apex of the subcostal vein somewhat out- 

 wards to the base of the fork of the cubital vein and then very 

 undulating or in a zigzag to the apex of the anal cell ; the undulation 

 is caused by the blackish colour stretching more or less out along the 

 veins towards the hind margin; at the apex of the radial vein there 

 is a small, isolated spot; at the posterior upper corner of the discai cell 

 there is a somewhat pronounced clear spot. The costa is black haired at 

 the base; squamulæ with white hairs at the margin, Halteres black. 



Female. Agreeing with the male, only the frons slightly broader, 

 and the inner eye-margins diverging just from the upper corner. 



Length 7 — 12 mm. 



A. anthrax is very rare in Denmark; we have only three speci- 

 mens from earlier time, and without particular locality. 



Geographical distribution : — Europe down into Italy ; towards the 

 north to northernmost Scandinavia, and it seems most common in 

 the north. 



2. Hemipentlies L6w. 



Species of medium size and black colour with black marked wings. 

 The genus agrees in most respects with Argyramoeha. The head is 

 globular, cut off behind and deeply excavated, about as broad as 

 thorax. The eyes large, higher than broad, separated in both sexes, 

 mostly so in the female; the posterior eye-margin is emarginate 

 and from the middle of the emargination. an incipient dividing line 

 stretches forward; the facets are of equal size. Antennæ inserted in 

 the middle, somewhat distant at the base. Jowls small, yet some- 

 what, but very slightly, descending below the lower eye-margin. 



