Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075
OAI: https://revistas.ucr.ac.cr/index.php/rbt/oaiThe purpose of this research is to diagnose and name 158 new species of Costa Rican Mesochorus Gravenhorst, 1829 (Ichneumonidae) from Área de Conservación Guanacaste [ACG] in northwestern Costa Rica, and to provide host records for 129 of these.