Notes on the Neotropical Zethus Fabricius, 1804 (Hymenoptera, Vespidae, Eumeninae) with the description of two new species from Brazil

Abstract

Two new species, Zethus (Zethus) aliceae Lopes, sp. nov. (Brazil) and Z. (Zethus) sinuostylus Lopes, sp. nov. (Brazil) are described and figured. New synonymy is proposed for Zethus (Zethoides) biglumis Spinola, 1841 (=Zethus ferrugineus de Saussure, 1852, syn. nov.