Dipt era 289 



tt. Femora, at least in part, with 



strong black spines. Widely 



distributed . Palpomyia Megerle 



oo. R2+3 coalescent with R4+5 hence cell Ra 



is obliterated. 



p. In the female the lower branch of the 

 media with an elbow near its base pro- 

 jecting proximad, the petiole of the 

 media coalescent with the basal section 

 of the radius, wing long and narrow, 

 radial sector ending near the tip of the 

 wing; venation of the male as in Bezzia; 



front concave. United States 



Stenoxenus Coq. 



pp. Venation otherwise, front not concave, 

 q. Subcosta and RI more or less coalescent 

 with the costa; wing pointed at the 

 apex, much longer than the body; 

 antennae fourteen segmented, not plu- 

 mose. India Haasiella Kieff. 



qq. Subcosta and radius distinct from the 



costa. 



r. Abdomen petiolate . . . Dibezzia Kieff . 

 rr. Abdomen not petiolate. 



s. Head semi-globose; hind tarsi un- 

 usually elongate in the female; 

 antennae of the male not plumose. 



Europe Macropeza Meigen. 



ss. Head not globose, more or less 

 flattened in front; antennae of 

 the male plumose. Widely dis- 

 tributed Bezzia Kieff. 



t. Fore femora, at least, armed with 



stout spines below 



Subgenus Bezzia Kieff. 



tt. Femora unarmed 



....Subgenus Probezzia Kieff. 



ii. Media of the wing simple, and otherwise not as in "i". To 

 this group belong numerous Chironomid genera, none of 

 which are known to be noxious to man. 

 ff. The costal vein apparently is continued around the hind margin of 



the wing; radius with at least four branches. 



g. Wing ovate pointed, with numerous veins; crossveins, if evi- 

 dent, before the basal third of the wing; veins very hairy; 



very small moth-like flies PSYCHODIDJE 



h. With elongate biting proboscis; the petiole of the anterior 

 forked cell of the wing (R 2 ) arises at or beyond the middle of 

 the wing (fig. i63d) Phlebotomus Rdi. 



