SYSTEMATICS, MORPHOLOGY AND PHYSIOLOGY Description of Males from Three Species of Eumeninae (Hymenoptera, Vespidae) YC GRANDINETE 1,2 , FB NOLL 2 , RB LOPES 1,2 1 Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP), Pós Graduação em Entomologia, Univ de São Paulo (USP), Ribeirão Preto, SP, Brasil 2 Instituto de Biociências, Letras e Ciências Exatas (IBILCE), Depto de Zoologia e Botânica, Univ Estadual Paulista (UNESP), São José do Rio Preto, SP, Brasil Abstract Keywords Potter wasps, mason wasps, solitary wasps, male genitalia Correspondence YC Grandinete, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP), Pós Graduação em Entomologia, Univ de São Paulo (USP), Ribeirão Preto, SP, Brasil; bioyuri@gmail.com, ycg@ usp.br Edited by Raphael C Castilho – FCAV/UNESP Received 9 March 2016 and accepted 3 November 2016 * Sociedade Entomológica do Brasil 2016 The external morphology and genitalia of the males of Stenonartonia mimica (Kohl 1907), Sphaeromenes discrepatus Giordani Soika, 1978 and Gamma bolivianum flavior Giordani Soika, 1990 are described for the first time. Introduction Eumeninae is the most diverse subfamily of Vespidae and currently comprises 43 genera in the Neotropical region, including Delta which was introduced (Carpenter & Garcete-Barrett 2003). Many taxonomic and phylogenetic studies have been produced and it is common to use main- ly females as references for new descriptions and charac- ters for cladistics analysis (Carpenter & Cumming 1985; Cooper 2012, 2013a, b, 2014, 2015; Ferreira et al 2015; Garcete-Barrett 2011, 2014; Grandinete et al 2014; Hermes et al 2013; Lopes et al 2015; Vernier 1997). However, males are important not only as a source of characters for phylo- genetic studies but also for taxonomic approaches, using the external morphology and mainly the genitalia as a source of characters to synonymize or separate cryptic species and subspecies that are commonly separated based only on color differences, a common practice in Eumeninae (for discussion see MacLean et al 1978; Carpenter 1987; Carpenter & van der Vecht 1991). Stenonartonia Giordani Soika, 1973, had its last complete revision performed by Garcete-Barrett (2011) and recently had one more new species described (Garcete-Barrett 2014), totaling 15 recognized species. Sphaeromenes Giordani Soika, 1978, has only two recognized species, which were revised by van der Vecht (1980), who also provided an identification key. Gamma Zavattari, 1912 has six described species, two of them with one subspecies each (Cooper 1999). Herein, we describe for the first time the external mor- phology and genitalia of males from Sphaeromenes discrepatus Giordani Soika, 1978, Stenonartonia mimica (Kohl 1907) and Gamma bolivianum flavior Giordani Soika, 1990 (Figs 1-5, 6-10, and 11-16). Methods The examined males belong to the following institutions: S. mimica to the “Coleção de Hymenoptera IBILCE/ UNESP” (HYMSJRP; São José do Rio Preto, Brazil —Dr. Neotrop Entomol DOI 10.1007/s13744-016-0465-z