Taxonomic and Zoogeographic Notes on Japanese Orthocentrinae (Hymenoptera, Ichneumonidae), with Descriptions of Four New Species Author Watanabe, Kyohei Kanagawa Prefectural Museum of Natural History, 499 Iryuda, Odawara, Kanagawa 250 – 0031, Japan watanabe-k@nh·kanagawa-museum·jp text Bulletin of the Kanagawa Prefectural Museum (Natural Science) 2023 2023-03-28 52 7 44 journal article 296841 10.5281/zenodo.11283244 b9f71976-9af1-46a9-ab31-a2e72a353865 2189-6720 11283244 3EF5E302-218F-4AED98C3-726441EE48DB Genus Aperileptus Förster, 1869 Aperileptus Förster, 1869: 109 . Type species: Plectiscus albipalpus Gravenhorst, 1829 . Designated by Förster (1871) . Three species, Ape. albipalpus ( Gravenhorst, 1829 ) , Ape. obscurus Humala, 2007 , and Ape. vanus , have been recorded from Japan ( Dasch, 1992 ; Kasparyan et al., 2012 ). In this study, I record some distribution data of Ape. albipalpus and Ape. vanus . The identification of males of this genus is difficult except for Ape. vanus , thus the male of Ape. albipalpus was not treated in this study.