Review of the genus Macdunnoa (Ephemoptera: Heptageniidae) with description of a new species from Florida

The imago, nymph, and egg of Macdunnaa brunnea n. sp. are described from the south­ eastern U.S. Heptagenia persimpiex is transferred to Macdunnoa and additional diagonostic characters are given for this species and for Macdunnoa nipawinia. The relationship of i1.1acdunnaa to Stenacron and Stenonema is discussed.