119 

 MYCETOPHILA Meig. 



M. discoidea Say/ Rouville Co. (C). 

 M. punctata Meig. Montreal (C). 



ACNEMIA Winnertz 



A. flaveola Coq. Montreal VII (Be). 



EXECHIA Winnertz 

 E. nugax Johannsen. Rouville Co. (Johannsen). 



BOLITOPHILA Meig. 



B. hybrida Meig. St. Johns Co. IX (C). 



Family CECIDCMYIDAE 



The "Gall-Gnats" are minute creatures with broad wings. There are a very large num- 

 ber of species differing greatly in habits but they have not been studied by any one in this 

 Province. One of the most familiar galls, known as the Pine-cone Willow-gall is made by 

 one of these gnats depositing its eggs in the opening buds of the Willow. 



DASYNEURA Rond. 



D. gibsoni Felt. Ottawa District (G). Bred from flower heads of Thistles. 



LESTODIPLOSiS Kieffer 

 D. grassator Fyles. Como (Fy). From galls of Phylloxera on Grape. 



MAYETIOLA Kieffer. 



iVI. destructor Say. "The Hessian fly." 



CECIDOMYIA Meig. 



C. carbonifera O. S. Quebec VIII (Fy). Bred from Golden rod leaves. 



C. siiiqua Walk. Levis (Fy). 



C. strobiloides O. S. Montreal (W); Baskatong VII (G). 



