DURHAM DIPTERA. Ill 



XXIII. 



35 (84). Antennae with a terminal style, which is two-jointed 



and bent downwards (II 1. 32). Cyrtoma, Mg. (190) 



36 (23). O. present (V. n). 



37 (38). 0.8. (anal angle of the wing) scarcely apparent. 



210. Sciodromia, Hal. (11 12. immaculata, Hal.) 



38 (37). 0.8. prominent. 



39 (40). Proboscis long and perpendicular. 



Rhamphomyia, Mg. (191) 



40 (39). Proboscis short, or, if long, then horizontal. 



41 (42). O.6 1 longer than 0.5 1 . Hybos, Mg. (189) 



42 (41). O.6 1 shorter than 0.5 1 . 



43 (50). Third joint of antennae much lengthened, and termin- 



ating in a style. 



44 (45). Hind femora thickened and thorny beneath. The 



tibiae shorter than the femora and somewhat bent. 



GEdalea, Mg. (199) 



45 (44). Hind femora not thickened and without thorns. The 



tibiae as long as the femora, and straight. 



46 (47). Proboscis longer than the head, and horizontally 



protruding (VI. 22). Euthyneura, Mg. (203) 



47 (46). Proboscis shorter than the head, scarcely protruding 



(VI. 21). 



48 (49). Legs yellow. Trichina, Mg. CI 97) 



49 (48). Legs black. Microphorus, Mcq. (198) 



50 (43). Third joint of antennae short, and with a terminal 



bristle (III. 26). 



51 (52). Third joint of antennae conical. Bristle exactly 



terminal. Leptopeza, Mcq. (201) 



52 (51). Third joint of antennae oval. Bristle inserted before the 



end, almost dorsal (III. 26). Ocydromia, Mg. (200) 



tables op species. 

 189. Hybos, Mg. 

 Life history unknown. 

 1 (2). Fore and mid legs black, wings brown. 

 987. Hybos gr ossifies, L. 

 Males common. Hesleden, Shull, Wearhead, Bishop 

 Auckland. I have not as yet taken the female. 



