60 Tachinidae. 



the apical strong. Abdomen with the excavation on second segment 

 reaching the margin or stopping more or less before, sometimes 

 different in the two sexes and sometimes present only at base. Discai 

 angle without veinlet or fold. Squamiilæ bare or hairy. — The aberrant 

 genus Cephenomyia is Oestrid-like, pilose, without bristles and with 

 a fan of pale hairs on hypopleura. 



The species are as larvæ mainly saprophagous, some more or 

 less to really parasitic {Phorjnia-species on youngs of birds; Pollenia 

 in earthworms; Onesia in snails; Liicilia hujonivora on Biijo). Cephe- 

 nomyia is parasitic on Cerviis and Rangijer. 



Tahle of genera. 



1. Hypopleura with a row of pale, somewhat bristly hairs; 

 no sternopleural bristles. Densely pilose Oestrid-like 



species without bristles 17. Cephenomyia. 



— Hypopleura with black bristles; sternopleural bristles 

 present. Not pilose species 2. 



2. Exterior posthumeral bristle placed higher than or as 

 high as præsutural bristle; propleura bare; thorax 

 clothed with felted, metallic coloured hairs, at all events 

 present as tufts on pleura. Vibrissal angle high above 



lower margin of epistoma 18. Pollenia. 



■ — Exterior posthumeral bristle placed lower than præ- 

 sutural bristle (sometimes wanting in Engyzops); pro- 

 pleura hairy; thorax without felted, metallic coloured 

 hairs. Vibrissal angle not or slightly above lower margin 

 of epistoma 3. 



3. Common stem of subcostal, radial and cubital vein with 



a series of cilia on inner side 19. Phormia. 



— Common stem of subcostal, radial and cubital vein 

 without hairs 4. 



4. Cheeks distinctly hairy 5. 



— Cheeks bare or practically so 7. 



5. Arista long-plumose in about basal two thirds ; squamulæ 



hairy 21 . Calliphora. 



— Arista somewhat short-plumose in about basal half, or 



when longer plumose squamulæ bare 6. 



6. Abdomen bluish or greenish, without discai bristles; 



three sternopleural bristles (generally) 22. Onesia. 



— Abdomen black, fourth segment with a row of discai 



bristles; two or three sternopleural bristles 24. Engyzops. 



7. All bright metallic shining green or golden species; 

 squamulæ bare; a præsutural intraalar bristle present. . 20. Lucilia. 



— Thorax not metallic shining, abdomen blue; squamulæ 



hairy; no præsutural intraalar bristle 23. Cynomyia. 



