Thirty-two caddisfly species are reported from Ontario for the first time, including 24 in the family Hydroptilidae, three in the Hydropsychidae, and one each in the Leptoceridae, Limnephilidae, Molannidae, and Polycentropodidae. The known caddisfly richness of the province increases from 309 to 341 species, including a doubling of the known hydroptilid fauna. Many more species undoubtedly remain to be discovered in this large and relatively undisturbed province.
Houghton, David and Etnier, David
"New Province Records of Southern Ontario Caddisflies (Trichoptera),"
The Great Lakes Entomologist, vol 56
Available at: https://scholar.valpo.edu/tgle/vol56/iss1/6