TACHINID^. 3 g 3 



12. Abdomen subopaque, partly or wholly covered with pollen. 15 

 Abdomen largely or wholly shining and without pollen. 13 



13. Palpi well developed. ........ 14 



Palpi vestigial, filiform, terminating in a long bristle. 



Atrophopalpus. 



14. Abdomen wholly shining (35) Myiophasia. 



Base of last three abdominal segments gray pruinose. 



Paradmontia. 



15. Eyes bare, or with indistinct, short hairs. .... 18 

 Eyes distinctly hairy 16 



16. Vibrissae on a level with oral margin. ..... 17 



Vibrissae distinctly above oral margin. . . . Meigenia. 



17. Posterior cross-vein abont midway between anterior cross-vein and 



bend of fourth vein. ...... Eulasiona. 



Posterior cross-vein close to bend of fourth vein. Lasiona. 



18. From one to three pairs of frontal bristles below base of antennae; 



antennae at least two-thirds as long as face. ... 10 



No frontal bristles below base of antennae. .... 19 



19. Cheeks two-thirds as broad as the eye-height (20, 21.) Phyto. 

 Cheeksless than two-thirds of eye-height (32,33). Rhinophora 



20. First posterior cell open, or, if closed, short petiolate. . 22 

 First posterior cell closed and long petiolate, the petiole two-thirds 



as long as the posterior cross-vein. . . . . . 21 



21. First vein bristly. Paradmontia. 



First vein not bristly. ...... Mauromyia. 



22. Third vein not bristly on more than one-fourth the distance to an- 



terior cross-vein; sides of face without macrochaetae. . 23 

 Third vein bristly on at least three-fourths the distance to anterior 

 cross-vein; sides of face with macrochaetae (23, 24). 



Ceratomyiella. 



23. Face in profile strongly convex; orbital bristles usually present in 



both sexes; front tarsi of male usually dilated. Admontia. 

 Face strongly receding; female with two orbital bristles. 



Sarcoclista. 

 Face in profile concave; orbital bristles wanting in male. . 24 



24. First vein beyond tip of auxiliary vein distinctly bristly. 



Meig-eniella. 

 First vein not bristly beyond tip of auxiliary (24). 



Cryptomeigenia. 



25. Proboscis shorter or only slightly longer than height of head. 26 

 Proboscis at least one-third longer than height or head. . 71 



26. Frontal vitta opaque, ........ 27 



Frontal vitta shining (37,38). .... Hemyda. 



27. Vibrissae on a level with oral margin. ..... 28 



Vibrissae distinctly above oral margin. ..... 58 



Vibrissae not distinguishable from the hairs on the facial ridges. 



Trixa. 



2S. Penultimate joint of arista at least twice as long as broad. 29 



Penultimate joint shorter or only slightly longer than broad. 36 



