A new species of Procestus Townes (Hymenoptera: Ichneumonidae: Banchinae) from Brazil Author Herrera-Flórez, Andrés Fabián University of Munich (LMU) Biozentrum Martinsried, Grosshadernerstr. 2, 82152 Planegg-Martinsried, Germany Author Penteado-Dias, Angelica 0000-0002-8371-5591 Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, CEP 13565 - 905, São Carlos, SP, Brasil. https: // orcid. org / 0000 - 0002 - 8371 - 5591 text Zootaxa 2021 2021-03-10 4941 4 542 552 journal article 7688 10.11646/zootaxa.4941.4.4 59174531-fe6f-4215-a12f-e89774871d14 1175-5326 4595664 6E07789B-8BAD-45DE-9CE8-2C89AB3911A3 Key to the species of Procestus 1. Frons with a median horn and a lateral tubercle. Epomia connected across top of pronotum with epomia on opposite side. Posterior transverse carina of propodeum complete ( Fig. 15 ). Mexico .............................. P. nabis Townes, 1970 - Frons simple (unarmed) ( Figs 2, 3 & 5 ). Epomia not connected across top of pronotum with epomia on opposite site. Posterior transverse carina of propodeum absent ( Figs 9, 10 & 21 )...................................................... 2 2. Metasoma black................................................................... P. simplex Townes, 1970 - Metasoma mostly yellow............................................................................... 3 3. Metapleuron mostly black. Apical part of metasoma mostly black. Apical part of fore wing with a brownish spot. Costa Rica ......................................................................... P. pammae Ugalde & Gauld, 2002 - Metapleuron mostly yellow. Apical part of metasoma mostly brownish. Apical part of fore wing with a blackish spot. Brazil ....................................................... Procestus jatai sp. n. Herrera-Flórez & Penteado-Dias