FAMILY CECIDO-MYID.E — THE GALL MIDGES 105 



5. Subcosta and third vein united as though by a very short crossvein. 



Microcerata Felt 

 Subcosta and third vein separate and with no trace of a crossvein ... (> 



6. Branches of the fork of the fourth vein even Konisomyia Felt 



Branches of the fork of the fourth vein irregular (22). . .Tritozyga Loew 



7. Flagellate antennal segments sessile, with a length only a little 



greater than their diameter Neocatocha Felt 



Antennal segments not sessile, more elongate 8 



8. Antennfe with not more than ten segments Neptunimyia Felt 



Antenna with at least eleven segments 9 



9. Costa ending at or a little beyond the tip of the third vein (6, 26). 



Lestremia Meigen 

 Costa extending beyond the apex of the wing (9, 16). . .Catocha Haliday 



10. Third vein usually well separated from the costa and frequently 



uniting with it at or beyond the apex 11 



Third vein rarely extending to the apex of the wing; flagellate anten- 

 nal segments subsessile in female, ornamented with crenul ate whorls 

 or structures more complex than irregular whorls of simple hairs . . 14 



11. Flagellate antennal segments globose, stemmed in both sexes, or the 



second enlarged 12 



Flagellate antennal segments cylindrical, sub-sessile, the second not 

 enlarged (23) Mycophila Felt 



12. Fourth vein absent 13 



Fourth vein present (28) Joannisia Kieffer 



13. Antennal segments stemmed (5) Trichopteromyia Williston 



Antennal segments sessile, the second enlarged Ceratomyia Felt 



14. Flagellate antennal seg-ments with a more or less distinct subapical 



collar forming a more or less cup-shaped cavity; claws denticulate. 



Prionellus Kieffer 

 Flagellate segments with subapical whorl of stemmed disks or spines. 15 



15. Flagellate segments with subapical whorl of stemmed disks; claws 



with minute apical tooth Monardia Kieffer 



Flagellate segments with spines 16 



16. Flagellate segments with short, stout, usually recurved spines (24, 



27 ) Cordylomyia Felt 



Flagellate segments with short, stout, curved spines (32). 



Corinthomyia Felt 



17. First segment of the tarsi shorter than the second 19 



First segment of the tarsi longer than the second 18 



18. Tarsi with four segments; three longitudinal veins (7, 18). 



Miastor Meinert 

 Tarsi with three segments; two longitudinal veins (11). 



Heteropeza Winnertz 



19. Tarsi with five segments 20 



Tarsi with two segments Oligarces Meinert 



20. Wing membrane finely haired 21 



Wing membrane scaled Kronoinyia Felt 



