Nashikenmon (Pear Sword Crest) - Nashikenmon (English spelling) Acronicta rumicis

Japanese: ナシケンモン(梨剣紋) - ナシケンモン（英語表記）Acronicta rumicis

An insect of the Noctuidae family of the Lepidoptera order. Found in the temperate zones of Eurasia. Spreads approximately 3.5-4cm. The forewings are blackish brown, and the hind wings are dark brown. The Kenmon noctuid moths, including this species, are found in temperate zones around the world, with around 20 species found in Japan. The larvae produce tufts of hair, which is unusual for the Noctuidae family. They mainly feed on tree leaves, but this species is often found on low shrubs and herbaceous plants such as knotweed. The name Kenmon comes from the sabre-shaped black pattern on the forewings of some species. [Sugi Shigeo]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鱗翅目ヤガ科の昆虫。ユーラシア大陸の温帯に分布。開張約3.5～4cm。前翅は黒褐色，後翅は暗褐色である。本種を含むケンモンヤガは世界の温帯域に分布し，日本に約20種を産し，幼虫は毛束を生じ，ヤガ科としては異例。おもに樹木の葉を食べるが，本種の場合は低い灌木やタデなどの草本につくことが多い。ケンモンの名は，一部の種の前翅にサーベル状の黒色紋を有することによる。【杉繁郎】

出典　株式会社平凡社世界大百科事典第２版について　情報

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