278 



NORTH AMERICAN DIPTERA 



Otitidae IV. — 47, Tritoxa flexa ; 48, Himeroessa pretiosa; 49, Poecilomyia longicornis ; 50, 

 Ulidia apicalis; 51, Stictomyia punctata; 52: Dasymetopa stigma; 53, Califortalis hirsutifrons; 

 54, Ortalimyia aldrichi; 55, Delphinia; 56, Coniceps niger; 57. Diacrita costatis ; 58, Mega- 

 laemyia; 59, Melieria siinilis; 6(i, Califortalis iiirsutifrons; 61, Tetanops luridipennis. 



