1. Antenna; with a terminal liristlc 3 



Antenna without terminal style or bristle 2 



2. Antennje short, third joint rounded, with terminal bristly hairs. 3 

 Antenntc elongate 



3. Antenna; inserted near the vertex. ^ 



Antennre inserted near the mouth ^ 



4. Wings with a stout eostal siuir near the tip of auxiliary vein. 



1'ti;i!OD(inti.\. 



Wings without such spur; anal cell absent. 

 0. Venation complete ; eyes pilose 



A'eins more or less obsolete : eyes bare. . 

 (J. I'rolioscis rudimentary 



Proboscis elongate 



7. Ocelli wanting; lai-ge flies 



Ocelli present ; smaller tlies 



Oncodes 



. Ol'SEHU'S 

 ACKOCEKA 



( )cN a;a 

 . 7 



L.\S1A 



. Kri.oNCius 



