Tachinidae. 59 



7. First posterior cell long petiolate 8. 



— First posterior cell not petiolate 9. 



8. Black species with only marginal bristles on abdomen; 



abdomen in female ending with a forceps 13. Leucostoma. 



— More or less grey species; abdomen witb numerous 

 discai and marginal bristles ; abdomen in female ending 



simply 16. Graphogaster. 



9. Abdomen more or less yellow 10. 



— Abdomen black or grey 11. 



10. Third and fourth abdominal segment with a row of 



marginal bristles 5. Clytiomyia. 



— Third and fourth abdominal segment with only a pair 



of marginal bristles 9. Evihrissa. 



11. Larger, grey species 6. Xysta. 



— Small, black species 11 . Weberia. 



12. First posterior cell petiolate 14. Ocyptera. 



— First posterior cell open 15. Lophosia. 



The genera fall in some natural groups: 

 Phasiae: Allophora, Clytiomyia, Xysta. 

 Gymnosomae: Gymnosoma, Xystogaster. 

 Phaniae caudatae: Evihrissa, Besseria, Weberia, Freraea. 

 Phaniae forcipatae: Leucostoma. 

 Ocypterae: Ocyptera, Lophosia. 

 A n urogyn ae : Graphogaster. 



V. Calliphorinae. 



No ventral membrane. Second abdominal sternite lying free 

 on the lateral margins of the tergite; the other sternites also visible, 

 either in both sexes or only in male. Eyes touching or approximate 

 in male, in female frons broad. Antennal arista moderately or long- 

 plumose in basal half or generally in nearly the whole length. Frontal 

 bristles reaching to insertion of antennæ, in male all crossing, stopping 

 before vertex; in female an uppermost outwards directed bristle 

 and two orbitals. Eyes bare. Exterior posthumeral bristle placed 

 lower than the præsutural bristle (if not then the thorax is clothed 

 with felted, metallic coloured hairs: Pollenia). Postsutural intraalar 

 bristles varying in number, often two, and a præsutural intraalar 

 bristle present or wanting. Generally two præsutural acrostichals, 

 sometimes one or no. Two to three sternopleural bristles. Propleura 

 hairy except in Pollenia (and in the foreign group Rhynchocalliphorinae 

 Vill.); postalar declivity more or less hairy. Upper part of postscutel- 

 lum not convex; three to six scutellar marginal bristles on each side, 



