416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



Not velvet black species, mid tibiae with only two spines at basal third and 



one at apical third or at near apex 7. 



7. Small species, three rows of frontal bristles, the two upper of four each and the 



lower of two, male third antennal joint conical, arista apical Conicera, p. 436. 



Larger species, three rows of four frontal bristles and generally also two post- 

 antennal reclinate bristles, antennas sometimes somewhat conical, but arista 

 dorsal or subapical Hypocera, p. 433. 



8. Wings present, and of usual size 9. 



Wings very much reduced, or absent ■ 23. 



9. Third vein forked 10. 



Thii'd vein unf orked 14. 



10. Frons with at least two upper rows of four bristles 11. 



Frons with weak hairs, and four very weak bristles on the vertex, costa destitute 



of bristles Gymnophora, p. 500. 



11. Frontal bristles erect, not projecting downward over the antennae 12. 



Frontal bristles proclinate, i. e. projecting downward over the antennae; or reclinate, 



i. e. lying back over frons as the other frontal bristles do 13. 



12. Mediastinal vein absent, clypeus, much produced, especially in female. 



Pseudohypocera, p. 439. 



Mediastinal vein present, clypeus not produced in either sex 13. 



Beckerina, p. 441. 



13. Frontal bristles proclinate, female ovipositor generally retracted and fleshy. 



Aphiochaeta, p. 445. 

 Frontal bristles reclinate; female ovipositor chitinised, projecting. 



Apocephalus, p. 442. 



14. Frons wholly destitute of bristles Platyphora ^ Vefrall. 



15. Frons with rows of bristles 16. 



16. First longitudinal vein absent Ecitomyia, p. 508. 



First longitudinal vein present 17. 



17. Post-antennal bristles reclinate, hind tibiae fringed above with bristles; female 



ovipositor exserted, chitinous Melaloncha, p. 500. 



Post-antennal bristles not reclinate 18. 



18. Post-antennal bristles absent, wings very hairy Chonocepfialus, p. 510. 



Post-antennal bristles present, proclinate 19. 



19. Spurs of posterior tibiae well developed 20. 



Spurs of middle tibiae wanting, those on hind tibiae minute 22. 



20. Ovipositor of female prolonged, stout, and heavily chitinised, wing neuration. 



normal Plastophora, p. 500. 



Ovipositor of female retracted, fleshy 21. 



21. First and third veins much approximated, legs very stout Syneura, p. 503. 



First and third veins widely separated, legs not stout, much as in Aphiochxta. 



Parasyneura ^, p. 516. 



22. Frons with two, or three transverse rows of bristles; female apterous. 



Puliciphora, p. 504. 

 Frons with four transverse rows of bristles; female with wings. . Metopina, p. 503. 



23. Wings present, but reduced in size 24. 



Wings entirely absent 27. 



24. Wings very narrow with very long bristles 25. 



Wings without long bristles 26. 



1 Platyphora Verrall has not been reported from America, but it has been suggested that it may probably 

 prove to be the male of ^nigmatias Meinert, so I have included it in the table. 



2 Parasyneura, new genus, is a Javanese genus, but I have included it in the table, as it is new to science 

 and I desire to indicate its affinities more clearly. 



