Aperileptus vanus Förster, 1871

[New SJN: Munehida-tsuya-hae-himebachi]

(Figs. 3A–E, 22J)

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.