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 Aperileptus vanus Förster, 1871 [New SJN: Munehida-tsuya-hae-himebachi ] ( Figs. 3A–E , 22J ) Fig. 2. Aperileptus albipalpus ( Gravenhorst, 1829 ) (EUM, female) ― A: lateral habitus; B: head, frontal view; C: head, mesosoma, and metasoma, dorsal view. Fig. 3. Aperileptus vanus Förster, 1871 (A–C: KPM-NK 81109, female; D, E: EUM, male) ― A, D: lateral habitus; B: head, frontal view; C: head, mesosoma, and metasoma, dorsal view; E: hind femur, lateral view. Aperileptus vanus Förster, 1871: 78 . Plectiscus (Aperileptus) obliquus Thomson, 1888: 1295 . Diagnosis . Epicnemial carina complete ( Fig. 22J ). Malar space long, 1.7–2.0 times as long as basal width of mandible, 0.4 times as long as width of face. Nervellus reclivous ( Figs. 3A, D ). T I mat. Ovipositor sheath 0.4–0.5 times as long as fore wing, 1.2–1.4 times as long as hind tibia. Width of female face 0.45–0.5 times as wide as head. Male hind femur with a dorsolateral pit ( Fig. 3E ). Fore wing length 3.5–4.0 mm. Materials examined . JAPAN : NARO , F, Hokkaido , Sapporo City , Jozankei , 20–29. VIII. 1989 , K. Maeto & M. Sharkey leg. (MsT) ; NARO , 5 F & 1 M, ditto, 29. VIII. – 12. IX. 1989 ; NARO , 3 F & 1 M, ditto, 12–21. IX. 1989 ; NARO , 2 F, ditto, 21–28. IX. 1989 ; NARO , F, Hokkaido , Kumaishi , Kenichi-gawa , Iwafuchi-zawa , 21–29. IX. 1995 , Y. Ito & T. Ito leg. (MsT) ; NARO , F, ditto, 10–20. X. 1995 ; NARO , Hokkaido , Ebetsu City , Nopporo , 29. VI. – 4. VII. 1992 , K. Konishi leg. (MsT) ; EUM , F, Hokkaido , Yuni , Kuobetsu-gawa R. , 2–12. VII. 2007 , N. Kuhara leg. (MsT) ; EUM , F, Hokkaido . Sapporo City , Hitsujigaoka , 18–25. VI. 2003 , K. Konishi leg. (MsT) ; EUM , M, ditto, 9–16. VII. 2003 ; EUM , F, ditto, 19–26. XI. 2003 ; EUM , F, ditto, 14–21. IX. 2010 ; EUM , 1 F & 1 M, Hokkaido , Bifue , Kusabue-rindo , 17. VIII. – 1. IX. 2012 , N. Kuhara leg. (MsT) ; NARO , F, Hokkaido , Sapporo City , Misumai , Kannon-zawa , 7–21. IX. 1993 , N. Kuhara leg. (MsT) ; NARO , F, Yamanashi Pref. , Daibosatsu-toge , 16. V. 1964 , T. Kikuchi leg. ; KPM-NK 81109 , F, Yamanashi Pref. , Yamato Vil. , Sagashio , 16. VI. 2007 , K. Watanabe leg. ; KPM-NK 81110 , F, Yamanashi Pref. , Enzan City. , Daibosatsu , Kaminikkawa-toge , 16. VI. 2007 , K. Watanabe leg. ; KPM-NK 89803 , F, Nagano Pref. , Outaki Vil. , Mt. Ontake-san , 25. VI. – 15. VII. 2015 , S. Shimizu leg. (MsT) ; KPM-NK 89804 , F, Nagano Pref. , Ueda City , Sugadaira-kogen , Tsukuba University , 19. X. – 16. XI. 2014 , S. Shimizu leg. (MsT) ; KPM-NK 81111 , F, Shizuoka Pref. , Kawanehoncho Town , Yamainudan , 14. VI. 2008 , K. Watanabe leg. ; KPM-NK 81112 , F, Kagoshima Pref. , Yakushima Is. , Mt. Aiko-dake , 26. X. – 27. IX. 2006 , T. Yamauchi leg. (MsT) . CHINA : F (det. Sheng ), Liaoning Province , Dandong , Kuandian , 23. VI. 2007 , M-L. Sheng. Leg. RUSSIA : ZISP , F (det. by Humala ), Krasnoselkup , 11. VIII. 1992 , D. R. Kasparyan leg. ; ZISP , F (det. by Rossem ), “Тебердинский ЗАпов. дол.р.ТебердА”, 8. VII. 1976 , D. R. Kasparyan leg. Distribution . Japan ( Hokkaido , Honshu, and Yakushima Is.); widely distributed in the Holarctic region. Bionomics . Unknown in Japan . Solitary parasitoid of Mycetophila hetschkoi Laudrock and Exechia bicincta (Staeger) ( Mycetophilidae ) ( Humala, 2007 ). Remarks . This is the first record of this species from Hokkaido , Honshu, and Yakushima Island.