Megastylus (Dicolus) impressor Schiødte, 1838

Watanabe, Kyohei, 2023, Taxonomic and Zoogeographic Notes on Japanese Orthocentrinae (Hymenoptera, Ichneumonidae), with Descriptions of Four New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 52, pp. 7-44 : 27-28

publication ID	https://doi.org/ 10.5281/zenodo.11283244
publication LSID	lsid:zoobank.org:pub:3EF5E302-218F-4AED98C3-726441EE48DB
DOI	https://doi.org/10.5281/zenodo.11283373
persistent identifier	https://treatment.plazi.org/id/03AD87B6-A225-FF95-FF20-6B948AC95BC2
treatment provided by	Felipe
scientific name	Megastylus (Dicolus) impressor Schiødte, 1838
status

Treatment

Megastylus (Dicolus) impressor Schiødte, 1838 View in CoL

[New SJN: Futahida-ashinaga-hae-himebachi]

( Figs. 13A–C View Fig , 23F, I, J View Fig )

Megastylus impressor Schiødte, 1838: 139 View in CoL .

Dicolus insectator Förster, 1871: 97 .

Diagnosis. Inner eye orbit slightly converged ventrally ( Fig. 13B View Fig ). FL I 9.0–11.0 (female) or 12.0 (male) times as long as maximum depth in lateral view. Fore TS I shorter than half length of fore tibia ( Fig. 23I View Fig ). Hind tibia not distinctly narrowed in apical 1/3 (usually slightly narrowed) ( Fig. 23J View Fig ). Propodeum with a distinct transverse depression anterior 0.25–0.28, with both anterior and posterior transverse carinae ( Fig. 23F View Fig ). T I and T II without longitudinal striae. Fore wing length 3.6–5.3 mm. In female: fore TS I 0.33–0.43 length of fore tibia; antennal cleaner of fore TS I not causing conspicuous outcurving of base of TS I. In male: face darkened, except for a narrow yellow area below antennal sockets; pronotum yellow ventrally; mesoscutum darkened; mesopleuron and scutellum reddish brown; hind femur 7.0–8.6 times as long as width in lateral view; T I 2.8–3.3 times as long as maximum width.

Material examined. JAPAN: NARO, M, Hokkaido, Kumaishi, Kenichi-gawa, Iwafuchi-zawa , 21– 29. IX. 1995, Y. Ito & T. Ito leg. (MsT) ; EUM, F, Hokkaido, Bifue, Kusabue-rindo , 17. VIII. – 1. IX. 2012, N. Kuhara leg. (MsT) ; KPM-NK 89769 , F, Niigata Pref., Nagaoka City, Suyoshi Town, Mt. Nokogiri-yama , 21. VII. – 21. VIII. 2014, S. Shimizu & R. Shimizu leg. (MsT) ; KPM-NK 89769 , F, ditto, 21. VIII. – 22. IX. 2014 ; KPM-NK 89770 , F, Toyama Pref., Toyama City, Arimine, Inonedani , 7–14. VII. 2009, M. Watanabe leg. (MsT) ; KPM-NK 89771 , F, ditto, 14–21. VII. 2009 ; KPM-NK 89772 , F, ditto, 21–28. VII. 2009 ; KPM-NK 89773 , F, Toyama Pref., Toyama City, Arimine, Jyurodani , 16–25. VIII. 2009, M. Watanabe leg. (MsT) ; KPM-NK 89774 , F, Toyama Pref., Toyama City, Kamegai , 1–8. IX. 2009, M. Watanabe leg. (MsT) ; KPM-NK 89775 , F, ditto, 15–26. IX. 2009 ; KPM-NK 89776 , F, Toyama Pref., Toga Vil., Kamimomose , 18–25. Aug. 2009, M. Watanabe leg. (MsT) ; KPM-NK 89777 , 89778 , 2 F, ditto, 1–8. IX. 2009 ; KPM-NK 89779 , 89780 , 2 F, ditto, 15–29. IX. 2009 ; KPM-NK 89782 , M, Tochigi Pref., Nasushiobara City, Shiobara, Oonuma , 6–15. VI. 2008, T. Matsumura leg. (MsT) ; KPM-NK 80781 , M, Kanagawa Pref., Yamakita Town, Minasegawa , 5. V. 2008, S. Yoshizawa leg. ; KPM-NK 89783 , M, Yamanashi Pref., Koushu City, Sagashio , 6. VIII. 2008, K. Watanabe leg. ; KPM-NK 89785 , M, Nagano Pref., Tateshina Town, Ashidahakkano, Mt. Tateshina , 26. VIII. 2011, S. Fujie leg. ; KPM-NK 89784 , M, Shizuoka Pref., Kawanehoncho, Yamainudan , 14. VI. 2008, K. Watanabe leg. ; OMNH, F, Ishikawa Pref., Kaga City, Mt. Kariyasu-yama , 28. VI. – 19. VII. 2002, K. Esaki leg. (MsT) ; OMNH, M, Kyoto Pref., Miyadu City, Kamiseya, Seyakogen , 10. X. 2015, S. Fujie leg. ; NIAES, 2 F & 3 M, Fukuoka Pref., Mt. Hiko , 2–3. XI. 1979, H. Takemoto leg. GERMANY: F (det. Rossem), D, BY, Starnberg, Kerschlach , 27. VII. 1927, Haeselb. leg.