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Nanium Townes, 1967 is a small New World parasitoid wasp genus in the subfamily Ctenopelmatinae Förster, 1869 (Hymenoptera: Ichneumonidae). Previously, it comprised five species: one from North America and four from Costa Rica. The current study reviews the Neotropical species of the genus, and includes descriptions of two new species, N. medianum Reshchikov & Sääksjärvi sp. nov. from Ecuador and N. atitlanensis Reshchikov & Sääksjärvi sp. nov. from Guatemala. A key to the species is provided.
The genus Rhinotorus Förster, 1869 is revised. Thirteen species are recognized including 3 species that are new to science (R. jussilai sp. nov., R. campester sp. nov., R. tarsilatus sp. nov.). Saotis brachycerus (Kasparyan & Kopelke, 2009) comb. nov. is considered to be a member of the genus Saotis. Rhinotorus similis (Brischke, 1892) is tentatively recorded from Austria and Sweden for the first time. A number of new host records are also provided: Cladius pectinicornis (Geoffroy, 1785) for R. leucostomus (Gravenhorst, 1829), Nematus lucidus (Panzer, 1801) for R. nasutus (Gravenhorst, 1829) and N. papillosus (Retzius, 1783) for R. jussilai sp. nov.