190 



XORTH AMERICAN DIPTERA 



KEY TO GENERA 



1. Proboscis more than twice as long as the head-height 2 



Proboscis not longer than the head-height (1, 2) . . . * Apiocera Westwood. 



2. Anal cell closed before the wing margin (3, 4). 



Rhaphiomidas Osten Sacken 

 Anal cell open Apomidas Coquillett 



* Painter, 1932, Ann. Ent. Soc. Amer., xxv, p. 351. 



Apioceridas. — 1, 2, Apiocera haruspex ; 3, 4, Rhaphiom.vdas acton. 



