170 Tachinidae. 



anterior claspers longer than posterior; forceps 



witli a deep ventral excision before apex 7. clathrata. 



14. Hind tibiæ fringed; penis with the end bent for- 

 wards 8. smor. 



— Hind tibiæ bare or practically so ; penis with the 



end not bent forwards 10. nigriventris. 



15. Scutellum with apical bristles; præbypopygial 

 segment without marginal bristles; orbits not 



specially narrow; forceps with parallel margins. . 7. clathrata. 



— Scutellum without apical bristles; præhypopygial 

 segment with marginal bristles; orbits quite 



narrow; forceps with a dorsal hump 23. offuscata. 



16. Subcostal vein bare 17. 



— Subcostal vein with more or fewer bristles 18. 



17. Third abdominal segment generally without 

 marginal bristles; scutellum without apical brist- 

 les; hind femora with no anteroventral bristles. . 21. pumila. 



- — Third abdominal segment with marginal bristles; 

 scutellum with apical bristles; hind femora with 

 anteroventral bristles 24. frenata. 



18. Scutellum without apical bristles 23. offuscata. 



— Scutellum with apical bristles 19. 



19. Hind femora without distinct anteroventral 

 bristles; middle femora without comb; forceps 

 with a distinct dorsal hump and a suddenly thin 



long apical part 22. haemorrhoa. 



— Hind femora with anteroventral bristles; middle 

 femora with a slight comb; forceps with a small 



dorsal hump but no thin apical part 24. frenatavar.cruentata. 



20. Hypopygium black 21. 



— Hypopygium red 27. 



21. Third abdominal segment without marginal 



bristles 22. 



— Third abdominal segment with marginal bristles 26. 



22. Præhypopygial segment without marginal brist- 

 les; fourth sternite with decumbent hairs (in 

 teretirostris a little erect but short) 23. 



- — Præhypopygial segment with marginal bristles; 

 fourth sternite with erect hairs; the bifid apical 

 apophyses on penis curved towards each other, 

 forming a ring 16. scoparia. 



23. Fifth sternite with basal part keel-shaped, its 

 apex protruding between bases of lamellæ, 



bifid 12. aratrix. 



■ — Fifth sternite not so shaped 24. 



24. Præsutural acrostichals present; forceps with a 

 long and deep furrow on each side at dorsal mar- 

 gin; penis with the end bent forwards 13. uliginosa. 



