This comprehensive resource, developed and maintained by Ian Gauld and David Wahl of the American Entomological Institute, aims to provide up-to-date information about the taxonomy and biology of North American Ichneumonidae, with more detailed treatment and keys to the Nearctic genera/species of a number of [mostly minor] subfamilies, incl. Acaenitinae, Brachycyrtinae, Collyriinae, Lycorininae, Ophioninae, Poemeniinae, Rhyssinae, Stilbopinae, and Xoridinae.