464 Tachinidae. 



joint about six times as long as second; it is of a peculiar shape, as 



it is cleft longitiidinally to the base, and tbus divided into two parallel 



branches the anterior of which is a little narrower than the posterior; 



arista thickened to near end, second joint 



rather elongated, not much shorter than third. 



Palpi yellow. Thorax grey pruinose, without 



stripes, scutellum of the same colour, pale 



just at apex. Four postsutural dorgocentrals. 



Abdomen as in the other species black and 



shining; the silver-white front bands on the 



three last segments a little broader, inter- 



rupted in the middle ; the usiial bristles present. 



Fie 97 A fis ^i oms Legs somewhat robust, black, tibiæ a little 



c^, antenna. obscurely brownish. Wings with posterior 



cross- vein rather near medial cross- vein; anal 



vein reaching margin; only cubital vein with bristles, stretching 



beyond medial cross-vein half way to the end. Squamulæ whitish. 



H alteres yellow. 



Female. Similar; frons of about the same breadth; antennæ of 

 normal shape, reddish at base and on basal part of third joint. 

 Length 3,7 — 4 mm. 



A. fissicornis is rare in Denmark, I know only five specimens, 

 three males and two females; one male is from Hornbæk the other 

 specimens from Lolland at Maribo and in Sløsse Mose; the latter 

 specimen was taken on '/g (L. Jørgensen), the others are all bred from 

 undetermined lepidopterous larvæ on ^'/g, ^j^ and ^l^ (Sønderup). 



Geographical distribution: — Europe down into Styria; not 

 known north of Denmark. 



Remarks: The male of this species was, when it was first de- 

 tected by Strobl, described as a female and considered as a monstro- 

 sity, both by him and by Mik; now, as many fissicorn Tachinids 

 (foreign) are known, it is quite sure that it is a normal species. 



7. A. nigrohalterata Villen. 



1921. Villen. Ann. de la Soc. Ent. de Belg. LXI, 45, 2. — A. articulata 

 Stein, 1924. Arch. f. Naturgesch. 90, 6, 131, 3. 



Male. Frons above broader than the eye; checks very narrow, 

 almost disappearing; jowls scarcely one third of the height of the 

 eye. Orbits and jowls yellowish brown; frontal stripe yellowish red. 

 Bristles as usual. Occiput grey, with black hairs and some few pale 



