Excerpt: In 1967 Mary Davis Ries published a list of 117 species of Odonata known to occur in Wisconsin, and later (1969) reported details of the distribution of species new to the state list. Collections from the Pine-Popple River in northeastern Wisconsin (Hilsenhoff 1972) added four more species to the list. Five additional Wisconsin records are reported below as the result of occasional collections made throughout the state.
Hilsenhoff, William L.
"New Records of Odonata from Wisconsin,"
The Great Lakes Entomologist: Vol. 5
, Article 2.
Available at: http://scholar.valpo.edu/tgle/vol5/iss3/2