For identification of Ontario fruit flies please see:
Jackson, M.D., Marshall, S.A., Hanner, R., and Norrbom, A.L. 2011. The fruit flies (Tephritidae) of Ontario. Canadian Journal of Arthropod Identification, 15. doi: 10:3752/cjai.2011.15. Available from http://www.biology.ualberta.ca/bsc/ejournal/jmhn_15/jmhn_15.html
Rhagoletis tabellaria
Apple Maggot (Rhagoletis pomonella)
Eutreta noveboracensis
Canada Thistle Stem Gall Fly (Urophora cardui)
Goldenrod Gall Fly (Eurosta solidaginis) puparium
Goldenrod Gall Fly (Eurosta solidaginis) puparium
Goldenrod Gall Fly (Eurosta solidaginis) emergence
Goldenrod Gall Fly (Eurosta solidaginis) emergence
Goldenrod Gall Fly (Eurosta solidaginis) emergence