Nematopodius (Nematopodius) debilis ( Ratzeburg, 1852 )

Kyohei Watanabe, 2019, Taxonomic and Zoogeographical Notes of Japanese Cryptinae (Hymenoptera, Ichneumonidae), with Description of Five New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 48, pp. 81-113 : 100-101

Nematopodius (Nematopodius) debilis ( Ratzeburg, 1852)

(Standard Japanese name: Hime-hoso-togari-himebachi) ( Fig. 10A )

Mesostenus debilis Ratzeburg, 1852: 143 .

Mesostenus tricolor Haupt, 1954: 115 .

Mesostenus homonymator Aubert, 1959: 146 .

Specimens examined. JAPAN: KPM-NK 69550 , F, Yamanashi Pref., Hokuto City, Masutomi, Biwakubo-sawa , 28. VII. – 7. VIII. 2007, K. Watanabe leg. (MsT) ; KPM-NK 69551 , F, Yamanashi Pref., Koushu City, Hikawa , 15. VII. 2010, K. Watanabe leg. ; KPM-NK 69552 , M, Nagano Pref., Outaki Vil., Mt. Ontakesan , 9. VIII. 2007, K. Watanabe leg. ; KPM-NK 69553 , F, Fukui Pref., Tsuruga City, Kinome-toge , 9. VII. 1981, H. Kurokawa leg. GERMANY: ZSM, F (det. by Horstmann), Germany, Kiel , 6. X. 1962 ; ZSM, M (det. by Horstmann), Germany, Wurzburg , 1. VI. 1971 .

Distribution. Japan * (Honshu); Europe.

Remarks. This is the first record of this species from Japan and Eastern Palearctic region. The Japanese specimens well shared with the character states of European specimens of N. debilis proposed by Horstmann (1990) except for two variations. i.e., the white band of antenna is absent ( Fig. 10A ) (usually present a small white band in European specimens) and the mesopleuron black dorsally ( Fig. 10A ) (usually largely reddish brown in European specimens). In this study, I conclude that these variations are intraspecific variation of this species, however further studies are needed to revise the taxonomic status of Japanese population.

Figures

Fig. 10.Nematopodius (Nematopodius) debilis (Ratzeburg, 1852) (A, KPM-NK 69550), Nematopodius (Nematopodius) montanus sp. nov. (B–G, KPM-NK 69554; H, KPM-NK 69929) and Pterocryptus takachihoensis (Momoi, 1966) (I, KPM-NK 5000333), females (A–G, I) and male (H) ― A, B, H, habitus, lateral view; C, head and mesosoma, lateral view; D, head, mesosoma and anterior part of metasoma, dorsal view; E, scutellum, postscutellum and propodeum, dorsal view; F, apical part of right fore wing; G, T2 and T3, lateral view; I, metasomal tergites, dorsal view.