SARCOPHAGID^. 



8. All the tibiae with a comb-like row of long stout bristles externally. 



Theria. 

 Without such bristles, or with irregularly placed ones. . 9 



9. Cheeks with long bristly hairs below 10 



Cheeks with short pile. ..... Erythrandra. 



10. Last section of fourth vein more oblique than the posterior cross- 



vein. . . . . . . . . . . .11 



Both veins in nearly the same straight line; two orbital bristles in 

 the female; none in the male. . . . Sarcophaga. 



11. Two orbital bristles in each sex. . . . Sarcophagula. 

 Two orbital bristles in the female, male? . . Helicobia. 



Sarcodexia and Sarothromyia are not included in the table for lack 

 of sufficient data. 



