31 



7. Sides of front hairy except a narrow space along each eye (p. 44) Alophora, 



Sides of front bare except two or three rows of hairs along each side of the 



frontal vitta. (p. 43) Fhoratiiha. 



8. Palpi present, well developed 17. 



Palpi absent or rudimentary, facial ridges never bristly on more than the lowest 



fourth, lirst vein bare 9. 



9. Eyes hare, or with indistinct, short, sj^arse hairs 10. 



Eyes distinctly hairy, apical cell ending far before the wingtip, sides of face 



bare, npper edge of third antenna! joint concave (p. 86) Linnwmyia. 



10. Face on the sides bearing hairs or macroch:eta» 11. 



Face on the sides bare 14. 



11. Head at the vibrissa) as long as at base of antenna^, a^iical cell ending far before 



the extreme wingtip 12. 



Head at vibrissic much shorter than at base of antenna', sides of face bare except 

 the row of three or four macrochtctn' on each; apical cell ending close to the 

 extreme wingtip (p. 126) Atrophopalpus. 



12. With one or more stout macrochaetfe on each side of face near lower end of the 



eye 13. 



Without such macrochsetsB, body very robust (p. 145) Epalpus. 



13. Each side of the face bearing one inacrocha^ta, body slender, (p. 139) Trichoplwra. 

 Each side bearing two or three macrochictte, body robust (p. 140) Cnplioccra. 



14. Proboscis at most only slightly longer than height of head 15. 



Proboscis over twice as long as height of head, head at vibrisste longer than 



at base of antenniie, apical cell ending close to the wingtip (p. 73) Beskta. 



15. Horizontal diameter of head at the vibrissa* as long as at base of antennae. . . 16 

 Horizontal diameter of head at vibrisste much shorter than at base of antennie, 



apical cell open, ending considerably before the extreme wingtip. .(p. 66) Ervia. 



16. Apical cell open, ending at the extreme wingtip (p. 67) Apinops. 



Apical cell closed, its petiole longer than the small crossvein, ending far before 



the extreme wingtip (p. 86) Ocyptera. 



17. First vein bare 30. 



First vein wholly or partly bristly, two or more pairs of frontal bristle below 



base of antenniB, vibrissiT nearly on a level with front edge of oral margin, 

 antennie reaching a t least to lowest fifth of face 18. 



18. Eyes hare or with indistinct short sparse hairs 20. 



Eyes distinctly hairy, head at the vibrissa^ noticeably shorter than at base of 



antenna-, sides of face bare, apical cell open 19. 



19. Facial ridges bristly on more than the lower half, third vein bearing from one to 



three bristles near its base (p. 65) Hypochaia. 



Facial ridges never bristly on more than the lowest fourth, third vein bristly 

 more than halfway from base to the small crossvein (p. 90) Exoristoides. 



20. Diameter of head at vibrissas as long as at base of antenna- 26. 



Diameter of head at vibrissa- noticeably shorter than at base of antennie 21. 



21. Tip of apical cell far before the extreme tip of Aving 23. 



Tip of apical cell at or close to the extreme tip of wing 22. 



22. Penultimate joint of arista over three times as long as broad, facial ridges never 



bristly on more than the lowest lifth (p. 57) Plcctops. 



Penultimate joint of arista not, or only slightly, longer than broad, facial ridges 

 bristly on at least the lower half (p. 59) Chwtophlepa. 



23. Apical cell open 24. 



Apical cell closed and long petiolate (p. 126) Meiacluvta. 



24. Sides of face destitute of rows of nuvcrocha-ta- 25. 



Sides of face each bearing a row of macrocha^ta- which <lescends almost to the 



lower end of the eye (p. 127) Chaitoplagia. 



