136 



NORTH AMERICAN DIPTERA 



Sti-ationiyid;e I.— 1, Chironiyza; 2, Beris ; 3, Beris. antenna; 4, Psephiocera, scutellum ; 

 5. Psephiocera, wing: 6, Acanthinomyia ; 7, 8, Solva ateirima (Coenomyidae) : 9, Hermetia; 10, 

 Hernietia, antenna; 11, Odontomyia ; 12, Odontomyia, antenna; 13, Stratiomys. antenna; 14, 

 Pedicella, antenna; 15, Ptecticus; 16, Ptecticus ; antenna; 17, Cyphomyia, antenna; 18. Mero- 

 sargus, antenna; 19, Histiodroma: 20, Euparyphus; 21. Euparyphus, antenna; 22, Euryneura. 

 head from in front; 23, Pelagomyia; 24, Neiuotelus ; 25. Aochletus, antenna. 



