White-spotted tussock moth (Euproctis similis)

Japanese: モンシロドクガ(紋白毒蛾) - モンシロドクガ（英語表記）Euproctis similis

An insect of the Lepidoptera family, Lymantriidae (illustration). Wings span 2-3cm. Generally, adults in summer are small. Both the body and wings are white. The rear half of the abdomen is orange-brown. The forewings have black markings near the bottom and rear corners, but in some individuals, they are almost completely missing. The antennae are comb-like, but the females have shorter combs. They are widely distributed from mainland Japan through the Korean Peninsula to the Eurasian continent. The larvae are black, with an orange-brown band on the back and a row of white markings on the sides of the black parts. They are pests that feed on various leaves, including those of the Rosaceae and Fagaceae families, and from the second instar onwards they produce poisonous setae that are attached to the cocoons, resulting in countless poisonous setae on the adult body.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鱗翅目ドクガ科の昆虫（イラスト）。翅の開張2～3cm。一般に夏の成虫は小型。体翅とも白色。腹部の後半は橙褐色。前翅の翅底部と後角近くには黒紋をもつが，個体によってはほとんど消失する。触角は櫛歯（くしば）状だが，雌では櫛歯が短い。日本本土から朝鮮半島を経て，ユーラシア大陸に広く分布する。幼虫は黒色，背面は帯状に橙褐色，黒色部の側方に白紋を連ねる。バラ科やブナ科など各種の葉を食べる害虫であるとともに，2齢以降には毒針毛を生じ，これが繭につけられるため，成虫の体にも毒針毛が無数に付着する。

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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