338 CHARLES T. BRUES. 



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



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



bristles Melaloncha gen. nov.3^' ' 



11. Male antennas prolonged into a slender point, with apical arista. Female 



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

 ner, seventh vein obsolete Comcera. : 



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



/'*„*** *'H*»i€tf* lse|uUt * t ,„ ' . Hypocera.3 

 12 Tibial spurs present on four posterior legsTwell developed, hind tibiae deli- 

 cately spinulose./.^X«.ct.'?n ffi/M f.tv*#0?.* Syneura.3<Jr3 



Tibial spurs present only on hind legs. I?t «€&-&.* : Puliciphora male.3«! 



Tibial spurs absent or obsolete, legs bare • 13. 



13. Fourth, fifth and sixth veins light l*Mttfc.«#A .«f »V. *? Metopina. 3V«i 



Fourth, fifth and sixth veins heavy) 5 . ?.£. . . • Pacliyiieurella gen. nov.3^ 



"T-4. Wings or halter-like appendages present, although of small size 18. 



Wings completely absent 15- 



15. Body when seen from above oval, cockroach-like- • .iEiligmatias fenaale.3<?£. 

 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 machrochaetae. abdomen with six dorsal sclerites, ■ 



and one ventral one, the sixth Chonocephalus, female^ 1 



Ocelli present, four dorsal abdominal sclerites Puliciphora, female. 3 i 



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



under the basal ones Termitoxenia. 3TS" 



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 form ; posterior segments never 

 d irected 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. 



Commoptera, female. 3 £ 



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



Ecitoiii.via, female. 3*7 

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

 with large macrochaetae 22. 



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



Acontistoptera, female. 3&S' 

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



in transverse rows Xaniouotnm, female. 3 *"? 



