FAMILY PHORID.TS 237 



4. At least the middle tibiae with strong bristles 5 



Tibiae without conspicuous bristles (15, 21) Beckerina Malloch 



5. Mesopleura haired, at least in front near the spiracle 6 



Mesopleura bare 8 



6. Mesopleura with very long bristle Chaetopleurophora Schmitz 



Mesopleura without long bristle 7 



7. Posterior tibise with from one to three rows of closely placed short 



setulse dorsally (19) Dohrniphora Dahl 



Posterior tibise without such ciliate rows . . Chaetocnemistoptera Borgmeier 



8. Third vein with closely placed setulse above (12) Aneurina Lioy 



Third vein bare or very sparsely setulose 9 



9. Middle tibiae with a strong anterior bristle beyond the middle. 



Paraspiniphora Malloch 

 Middle tibise with a very weak bristle beyond the middle, or bare 10 



10. Posterior tibise with one to three rows of conspicuous, short setulse 



dorsally (25) Diploneura Lioy 



Posterior tibise without such setulse (11) Triphleba Rondani 



11. Arista dorsal, at most sub-apical 12 



Arista apical i 17 



12. Middle tibise without dorsal bristles beyond the basal third 13 



Middle tibiae with more than one pair of dorsal bristles 14 



13. Eyes bare (3) Phora Latreille 



Eyes haired Chaetocnemistoptera Borgmeier 



14. Supra-antennal bristles present (6) Hypocera Lioy 



Supra-antennal bristles absent 15 



15. Ocelli widely separated, their triangle separated from the front an- 



teriorly by a three-ridged depression Stichillus Enderlein 



Ocelli normal, or the triangle forming a tubercle 16 



16. Eyes very large; front very narrow (26) Trineurocephala Schmitz 



Eyes normal; front wide Borophaga Endei-lein 



17. Posterior tibise with a pair of bristles on the basal half (4, 24). 



Conicera Meigen 

 Posterior tibise otherwise (22) Coniceromyia Borgmeier 



18. Wings entirely normal in size 19 



Wings smaller than normal or absent 46 



19. Third vein forked 20 



Third vein simple 32 



20. Posterior tibise with a dorsal row of contiguous hairs and a postero- 



dorsal row of short cilia or at least one or two short bristles 23 



Posterior tibise without the dorsal row of setulse and the postero-dorsal 

 cilia 21 



