Andrena (Trachandrena) sigmundi Cockerell 1902

County records: Alger, Allegan, Antrim, Clare, Clinton, Crawford, Dickinson, Gladwin, Grand Traverse, Ingham, Iosco, Isabella, Lake, Livingston, Mackinac, Midland, Montmorency, Otsego, Roscommon, Sanilac, Schoolcraft.

Notes. Specialist on Salix (Salicaceae) (LaBerge 1973).