A new species of Boletina Staeger fungus gnat was discovered in western Michigan and named Boletina ciliata Taber. Two adult males flew to a Malaise trap in an ecotone between swamp and second-growth forest dominated by black ash (Fraxinus nigra Marshall), paper birch (Betula papyrifera Marshall), red maple (Acer rubrum L.), and black cherry (Prunus serotina Ehrhart). Adult females and juveniles of Boletina ciliata remain unknown.