Benishitaba (red underwing) - Benishitaba (English spelling) Catocala electa

Japanese: ベニシタバ(紅下翅) - ベニシタバ（英語表記）Catocala electa

An insect of the Noctuidae family of the Lepidoptera order. Its hind wings are bright pink and its forewings are grey and bark-like, and when at rest it hides them underneath. Its wings span about 7cm. It is found in temperate Eurasia, and is not uncommon on the Japanese mainland. The larvae attach to willows, emerge in summer, and overwinter as eggs. There are three species of red-winged benishitaba in Japan, and the similar species C. nupta (Ezobenishitaba) lives mainly in central and northern Honshu, where its larvae attach to poplar and poplar. The hind wings of C. dula (Onibenishitaba) are almost vermilion, and they attach to Japanese oak, sawtooth oak, and oak.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鱗翅目ヤガ科の昆虫。後翅は明るい桃色，前翅は灰色の樹皮状で，静止するときには後翅をその下に隠す。開張約7cm。ユーラシア温帯に産し，日本では本土にまれでない。幼虫はヤナギにつき，夏に羽化，卵で越冬する。後翅の赤いベニシタバ類は，日本に3種分布しており，本種に似たエゾベニシタバC.nuptaが主として本州中部以北に生息しており，幼虫はドロノキやポプラにつく。オニベニシタバC.dulaでは後翅は朱色に近く，ミズナラ，クヌギ，カシワなどにつく。

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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