Townesioninae, a new ichneumonid subfamily from the Eastern Palaearctic (Hymenoptera: Ichneumonidae)

Abstract. Townesioninae, a new subfamily of Ichneumonidae, is established for two monotypic East Palaearctic genera: Townesion and Sachtlebenia. Townesion ussuriensis gen. et sp. n. is described. The new subfamily can be easily separated from other ichneumonids by the following autapomorphies: (1) the hind corner of metapleurum (bearing coxal foramen) projecting downward; owing to this, petiolar foramen far removed from the hind coxae and attached high on propodeum; (2) the hind part of tergite 4 abruptly curved downward and with backward directed spines on the hind margin; (3) tergites 5-7 reduced and retracted under apical part of tergite 4. Morphological peculiarites of the new subfamily and its relationships with other ichneumonids are discussed.