Species name
Koyaga numisma (Staudinger, 1888) ƒLƒ‚ƒ“ƒRƒ„ƒK
Taxonomy  Erastria numisma Staudinger, 1888, Stettin. ent. Ztg 49: 265 (TL: RFE, Primorye terr., Vladivostok ["Wladiwostok"], Askold Isl., bassin Razdolnaya river [Suifun] [MNHU, Berlin])
Erastria olivacea Leech, 1889, Proc. Zool. Soc. Lond. 1889: 526, pl. 53: 1 (TL: Japan,, Oiwake; Korea: Wonsan [Gensan], "Chang-yang" [BMNH, London])
Geographical range Far East Russia, Korea, Japan (Hokkaido, Honshu, Shikoku, Kyushu, Yakushima)
‰ˆŠCB, ’©‘N”¼“‡A“ś–{‚É•Ŗ•z. –kŠC“¹‚©‚ē‹ćB‚ÉŽŠ‚é–{“yˆę‚ʉ®‹v“‡‚ÉŽY‚·‚é.
Distribution map 
Biology —c¶Šś‚Ķ•sŚ.
Flying season 5-8ŒŽ‚ɏoŒ».
Remark

‘O桂ĶƒIƒŠ[ƒuF‚š‘Ń‚Ń, 桒ź‚©‚ē’†–¬‚ɉˆ‚¢’WFš‚ŖŠŃ‚­. ŠĀó–ä‚Ķ–¾—Ä, ”’F‚š‘Ń‚Ń‚½ž¶ó–ä‚š•\‚·.

Japan
Hokkaido
Japan
Hokkaido
Japan
Hokkaido
Female genitalia 
References  Y. Kishida (E.d.), 2011, The Standard of Mothss in Japan II: 285
VS Kononenko, S.B. Alm, L. Ronkay, 1998, Illustrated Catalogue of Noctuidae in Korea,161