PLATYPEZIM. 243 



TABLE OF GENERA. 



1. Discal cell open; fourth longitudinal vein not furcate; humeral bris. 



tie conspicuous (1) . . . ; . Platycnema # 

 Discal cell complete. 2 



2. Fourth longitudinal vein furcate 3 



Fourth longitudinal vein not furcate. ..... 4 



3. Hind tarsi of male with ornamental appendages (6, 7) Calotarsa. 

 Hind tarsi of male not with ornamental appendages (4, 5) . 



Platypeza. 



4. First longitudinal vein spinulose; third joint of antennae rather 



short (2, 3) Callimyia. 



First longitudinal vein not spinulose; third joint of antennae elon- 

 gate conical (8). Agathomyia. 



