Dufourea maura is recorded from Isle Royale National Park, Michigan. This is the first report of this western North American species east of the Great Plains states.
Arduser, Michael S.
"Records of Dufourea Maura (Hymenoptera: Halictidae) From Isle Royale National Park, Michigan,"
The Great Lakes Entomologist, vol 19
Available at: https://scholar.valpo.edu/tgle/vol19/iss3/6