Type specimens of Ichneumonidae (Hymenoptera) described by Brèthes held in the Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Argentina.

A catalogue is provided for the name-bearing type specimens of Ichneumonidae described by Brethes held in the Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". The collection includes a total of six holotypes, 16 lectotypes, and 43 paralectotypes, of 22 nominal species.