150 



NORTH AMERICAN DIPTERA 



Tabanida? I. — 1, 2. 3, Goniops chrysochroma ; 4, Pityoccra, antenna; 5, Apafolcstes; 6, 

 Lepiselaga crassipes; 7, Hamatopota punctulata ; S, Diachlorus; 9, Goniops chrysochroma, 

 larva; 10, Chrysops; 11, 12, Tabanus, antenna; 13, Snowiellus. 



