338 CHARLES T. BRUES. 



10. Tibise with bristles on the outer side before the apex 11. 



Middle tibise without bristles before the apex, hind tibise fringed above with 



bristles Melaloncha gen. nov. 



11. Male antennae prolonged iuto a slender point, with apical arista. Female 



antennae with a slight point where the arista is inserted at upper cor- 

 ner, seventh vein obsolete Conicera. 



Third joint usually rounded in both sexes, seventh vein distinct. 



Hjpocera. 



12. Tibial spurs present on four posterior legs, well developed, hind tibise deli- 



cately spinulose Sjimmiiji. 



Tibial spurs present only on hind legs. Pulieiphora male. 



Tibial spurs absent or obsolete, legs bare 13. 



13. Fourth, fifth and sixth veins light JVIetopiua. 



Fourth, fifth and sixth veins heavy Pacliyneurella gen. nov. 



14. Wings or halter-like appendages present, although of small size 18. 



Wings completely absent 15. 



15. Body when seen from above oval, cockroach-like- • • /Enigmatias female. 

 Body when seen from above constricted into the usual three parts 16. 



16. Abdomen of uniform texture, without more heavily chitinized dorsal sclerites, 



ocelli absent Wandolleckia, female. 



Abdomen with four or more conspicuous, heavily chitinized dorsal sclerites, 

 surrounded by a thinner membrane ... -17. 



17. Ocelli absent, also ocellar machrochaetse, abdomen with six dorsal sclerites. 



and one ventral one, the sixth Chonocephalus, female. 



Ocelli present, four dorsal abdominal sclerites Pulieiphora, female. 



IS. Abdomen much swollen, the last three segments small and directed forward 

 under the basal ones Termitoxenia. 



a. Arista simple, finely pubescent, thoracic appendages straight, club-shaped 



and flattened, oviparous sub-gen. Termitoxenia. 



b. Arista branched, not pubescent, thoracic appendages poorly developed, 



hoe-shaped or styliform ; viviparous sub-gen. Termitomyia. 



Abdomen often swollen, but of normal £orm ; posterior segments never 

 directed forward 19- 



19. Proboscis longer than the head and geniculate, abdomen fully chitinized 



throughout Psyllomyia, female. 



Proboscis shorter than head height, abdomen at least in part membranous. .20. 



20. Wings very small, strap-shaped ; often bearing long bristles 21. 



Wings larger, indistinctly veined, more or less triangular in shape. 



< 'oni moplera, female. 



21. Wings not bearing long bristles, abdomen without large rnacrochaetse. 



Eeitomyia, female. 



Wings with very long bristles, head much wider than thorax, abdomen often 



with large macrochsetas 22. 



22. Head transversely arcuate, abdomen bare, wing bristles very long and stout. 



Aeontistoptera, female. 



Head sub-triangular, abdomen with many very long macrochsetse arranged 



in transverse rows Vanioiiol inn. female. 



