KMPIDID^. 225 



Hind legs slender and not spinose 6 



6. Last antennal joint short and broad, with a short, thick style; pro- 



boscis short. , Anthalia. 



Last antennal joint lanceolate or elongate cylindrical; its style 

 short. ........... 7 



7. Proboscis rigid, directed forward, about as long as height of head. 



Euthyneura. 

 Proboscis short, fleshy, not directed forward. . . Trichina. 



8. Last antennal joint conical, arista terminal. . Leptopeza. 

 Last antennal joint oval, arista subdorsal. (7) . Ocydromia. 



9. Fourth and fifth longitudinal veins weak, sometimes confluent ba- 



sally Bicellaria. 



All longitudinal veins strong, simple; hind metatarsi thickened; 

 last antennal joint oval. .... Microsania. 



EMPIDIN^. 



1. Third longitudinal vein simple. 2 



Third vein furcate. ......... 5 



2. Proboscis not longer than height of head, porrect; outer antennal 



joint attenuated beyond the broad base and with an elongated 



style Microphorus. 



Proboscis longer than height of head; antennae plainly three- 

 jointed. .......... 3 



3. Proboscis porrect; third antennal joint long and slender; its style 



minute. Anthepiscopus. 



Proboscis rigid, projectingdownward; third antennal joint conical. 4 



4. Face bare Rhamphomyia. 



Face hairy. Neocota. 



5. Metapleurse bearing a cluster of hairs or bristles. ... 6 

 Metapleurse bare 10 



6. Proboscis longer than height of head, rigid. .... 7 

 Proboscis short and fleshy (4). . . . . Oreogeton. 



7. First antennal joint elongate, third antennal joint subcylindrical, 



with a minute style; mesonotum without bristles; color metallic 



(17) Lamprempis. 



First antennal joint not elongate; third joint conical, with a longer, 

 thickened style; mesonotum with bristles; color rarely metallic. 8 



22 



