Study of the genus Woldstedtius Carlson (Hymenoptera; Ichneumonidae; Diplazontinae) with description of three new species in South Korea

In this paper, a taxonomic review of the genus Woldstedtius Carlson in Korea with a key to the twelve Eastern Palearctic species is provided. Two species—W. yokohamensis and W. karafutensis, which were described by Uchida from Japan—are re-described based on holotype re-examination and the study of Korean material. The male of W. karafutensis Uchida is reported for the first time. Three species, W. corvinus sp. nov., W. nigrosignatus sp. nov., and W. pallidus sp. nov., are described as new. Five species, W. biguttatus Gravenhorst, W. citropectoralis Schmiedeknecht, W. holarcticus Diller, W. karafutensis Uchida, and W. yokohamensis Uchida, are reported from Korea for the first time.