The new genus Sclerocoelus is described for a large group of New World species including Sclerocoelus sordipes (Adams) new combination, Sclerocoelus regularis (Malloch) new combination, Sclerocoelusplumiseta (Duda) new combination, and about 40 undescribed species. The widespread Nearctic species Limosina sordipes Adams is redescribed and designated as the type species of Sclerocoelus. Lectotyp...