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) Phoranlha. 
8. Palpi present, well developed 17. 
Palpi absent or rudimentary, facial ridges never bristly on more than the lowest 
fourth, first vein bare 9. 
9. Eyes bare, or with indistinct, short, sparse hairs 10. 
Eyes distinctly hairy, apical cell ending far before the wingtip, sides of face 
bare, upper edge of third an tcunal joint concave (p. 86) Linnami/ia. 
10. Face on the sides bearing hairs or macrochaetse 11. 
Face on the sides bare 14. 
11. Head at the vibrissa'- as long as at base of antenna", apical cell ending far before 
the extreme wingtip 12. 
Head at vibrissas much shorter than at base of antenna 1 , sides of face bare except 
the row of three or four macrochsetse on each; apical cell ending close to the 
extreme wingtip (p. 126) Atrophopalpus. 
12. With one or more stout macroehsetae on each side of face near lower end of the 
eye 13. 
"Without such macrochaetae, body very robust (p. 145) Epalpus. 
13. Each side of the face bearing one inacrochaeta, body slender, (p. 139) Trichophora. 
Each side bearing two or three macrochsetse, body robust (p. 140) Cuphocera. 
14. Proboscis at most only slightly longer than height of head 15. 
Proboscis over twice as long as height of head, head at vibrissas longer than 
at base of antennae, apical cell ending close to the wingtip (p. 73) Bcskia. 
15. Horizontal diameter of head at the vibrissa? as long as at base of antenna'. .. 16 
Horizontal diameter of head at vibrissa' much shorter than at base of antenna', 
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 antenna', vibrissa' nearly on a level with front edge of oral margin, 
antennae reaching at least to lowest fifth of face 18. 
IX. Eyes bare or with indistinct short sparse hairs 20. 
Eves 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) Hypochceta. 
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 vibrissa' as long as at base of antenna' 26. 
Diameter of head at vibrissa' noticeably shorter than at base of antennae 21. 
21. Tip of apical cell far before the extreme tip of wing 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 fifth (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) Cluvtophleps. 
23. Apical cell open 24. 
Apical cell closed and long petiolate (p. 126) Afetacha <:ta . 
24. Sides of face destitute of rows of macrochaetae 25. 
Sides of face each bearing a row of macrochaetae which descends almost to the 
lower end of the eye , (p. 127) Cha-toplagia. 
