Two Neotropical subgenera of Coelioxys Latreille are revised. The monotypic C. (Platycoelioxys) Mitchell and C. (Rhinocoelioxys) Mitchell has seven valid species; six of them (C. agilis Smith, C. barbata Schwarz & Michener, C. clypearis Friese, C. nasidens Friese, C. paraguayensis Schrottky and C. zapoteca Cresson) previously described, and one, C. platygnatha Rocha-Filho & Packer n. sp. is new...