Body size data for North American Syrphidae & Tabanidae extracted from The Insects and Arachnids of Canada:
Vockeroth, J.R., 1992. The insects and arachnids of Canada, Part 18. The flower flies of the subfamily Syrphinae of Canada, Alaska, and Greenland: Diptera:Syrphidae. Research Branch Agriculture Canada Publication 1867: 1-456.
Teskey, H.J., 1990. The insects and arachnids of Canada, Part 16.The horse flies and deer flies of Canada and Alaska: Diptera: Tabanidae. Research Branch Agriculture Canada Publication 1838: 1-381.
