458 Tachinidae. 



— Antennæ black or with tiiird joint black; subcostal 

 vein with bristles in the whole length and the bristles 



longer and not dense 5. 



5. Apical cross-vein normal; palpi yellow 6. 



■ — Apical cross-vein wanting or rudimentary; palpi black 



or dark, at all events on apical part 4. frontalis. 



6. Subcostal vein bare on underside 2. pilipennis. 



— Subcostal vein with bristles on underside 3. crassicornis. 



7. Antennæ in male two-branched ; posterior cross-vein 



rather near medial cross-vein 6. frssicornis. 



— Antennæ in male normal; posterior cross-vein at the 

 middle between medial cross-vein and angle or 



beyond 8. 



8. Arista with first joint elongated 7. nigrohalterata. 



— Arista with first joint short 9. 



9. Antennæ and abdomen yellow; anal vein not reaching 

 margin; bristles on cubital vein beyond medial cross- 

 vein 8. bicolor. 



— Antennæ dark; abdomen not quite yellow; anal vein 

 reaching margin; bristles on cubital vein not beyond 



medial cross-vein 9. anomala. 



1. A. nudibasis Stein. 



1924. Stein, Arch. f. Naturgesch. 90, 6, 135, 11. — A. pilipennis 1920. 

 Villen. Ann. Soc. Ent. de Belg. LX, 66. 



Male. Frons above much broader than the eye; jowls about 

 one third of the height of the eye. Orbits greyish brown, cheeks and 

 jowls more greyish yellow; frontal stripe yellow to blackish. Vi- 

 brissæ not ascending, only some few hairs above the large vibrissa. 

 Orbits sparingly with black hairs, just produced on iipper part of 

 cheeks; jowls with black hairs. Occiput grey, with black hairs behind 

 postocular bristles and without pale hairs. Antennæ yellowish red, 

 third joint may be a little brownish on apical part; second joint 

 small and short, third long and broad, broadest at base, a little nar- 

 rower outwards, aboiit six times as long as second; arista brown, 

 distinctly thickened in fully basal half, second joint elongated. Palpi 

 yellow. Thorax brownish grey pruinose, with foiir slightly marked 

 dark stripes, the median narrow, abbreviated behind, the lateral 

 only represented by a spot in front of and behind the suture ; scutel- 

 lum grey pruinose, reddish at apex. Thorax black-haired ; four post- 

 sutural dorsocentrals, but sometimes the second abortive; the apical 

 hairs on scutellum crossing. Abdomen black, shining, the three last 

 segments with a narrow, silver-white front band, interrupted in the 



