194 Mr. F. Walker's Characters of undescribed Diptera 



:^00 Oviductus prominens. Uramyia, Desv. 

 ++ ++ Vena praebracliialis cubitalem attingens. 



"i^ Vena prasbrachialis cubitalem apicem versus attingens. 

 — Arista villosa ; vena prsebrachialis post flexuram arcuata. 



Anthracia, Meig. 

 = Arista vix tomentosa ; vena praebrachialis post flexuram 

 recta. Tryphora, Meig. 

 c<5<i u»i Vena praebrachialis cubitalem longe ab apice attingens. 

 O Facies perobliqua ; vena praebrachialis post flexuram 

 subarcuata. Tiichoprosopa, Macq, 

 O O Facies vix obliqua ; vena praebrachialis post flexuram 

 recta, Scopolio, Desv. 

 — J-H- Alae spina nulla costali. Melanophora, Meig. 

 § § § Arista plumosa. 



X Antennarum articulus S"^ 2° triplo Ibngior. 

 -4- Corpus ex parte pallidum. Oc/^pleurum, Macq. 

 -} — h Corpus non pallidum. Ebenia, Macq. 

 X X Antennarum articulus 3"^ 2" quadruplo longior. Tricho- 

 stylum, Macq. 



The genera Exorisla and Senometopia may be associated with 

 Eurignster, Phoroccra, and Masicera. 



Most of the exotic genera are thus distributed geographically : — 



America. — Senotahna, Prosopocheta, Exopalpus, Trichoprosopa, 

 Gonystylum, Aporia, Ebenia, Trichophora, Choetoprosopa, Micro- 

 trichodes. 



Africa. — Hoplacephala, Lamprometopia, Hystricephala. 



Asia. — Ochropleurum, Blepharella. 



Australia. — Trichostylum, Heterometopia, Aprotheca, Tritaxys, 

 Exechopalpus, Polychceta, Chlorogaster, Teretrophora. 



Genus Echinomyia, Dumeril. 



Echinomyia furiosa. 



Mas. — Nigricans, luteo-tomentosa, subtus pallide testacea, fron- 

 talibus piceis, oculis pubescentibus, palpis antennisque ru- 

 fescentibus, thorace vittis quatuor interruptis nigris, scutello 

 pedibusque rufescentibus, abdomine rubro, alis cinereis, 

 alulis testaceis. 

 Male. — Blackish, with luteous tomentum, pale testaceous be- 

 neath ; head and thorax thickly beset with stout black bristles, 

 head clothed behind and beneath with pale yellow hairs ; frontalia 

 piceous, widening much towards the antennae ; a few stout bristles 



