A New Species of Boletina Staeger Fungus Gnat (Diptera: Mycetophilidae)

A new species of Boletina Staeger fungus gnat was discovered in western Michigan. Adult males and females were collected in early spring in a Malaise trap in a paper birch-red maple-black cherry woods adjacent to black ash swamp and cattail marsh. The late March collection date is the earliest reported from the eastern United States for any species of the genus according to the literature examined. Boletina michigana Taber will sometimes key out to Boletina obscura Johannsen using keys based upon non-genitalic morphology, but male terminalia indicate a specific difference instead.