Ichneumon flies of the genus Trieces (Hymenoptera, Ichneumonidae, Metopiinae) from Peru

Trieces peruanus sp. n. from Peru is described, Trieces riodinis Gauld et al. is recorded from this country for the first time. Trieces peruanus belongs to the T. dentatus species-group, it is similar to Trieces dentatus H. Townes et M. Townes, according to the degree of development of the prepectal keel and lateral keels of the scutum, as well as to the presence of hairs along the upper margin of the metapleura. The new species differs from T. dentatus in the entirely black metasoma, black hind leg with the yellow apex of the femur and base of the tibia, and darkened upper margin of the clypeus. © Pleiades Publishing, Inc., 2009.