Leaf mining moth

Japanese: ハモグリガ(葉潜蛾) - ハモグリガ（英語表記）leaf mining moth

An insect of the Lepidoptera, Lyonetiidae family. It is a small moth with a wing span of 0.5-1.3 cm, with very elongated wings, elongated forewings, and hair margins longer than the wing width. Most of the larvae are leaf-mining moths, digging tunnels into a leaf and feeding on the tissue, and when they mature, they create a hammock-like cocoon or a cocoon covered with bundles of silk threads. Since the infested leaves leave unique feeding marks for each species, the type of moth can often be identified by considering the name of the host plant. Insects that leave feeding marks on leaves like this are commonly called "writing moths", but this does not necessarily mean that they are leaf-mining moths.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鱗翅目ハモグリガ科Lyonetiidaeの昆虫。翅の開張0.5～1.3cmの小さいガで，翅は非常に細長く，前翅頂は細長くのび，縁毛は翅の幅より長い。幼虫は大部分が潜葉性で，1枚の葉の中にトンネルを掘って，組織を食べ，老熟するとハンモック状あるいは絹糸の束で覆われた繭をつくる。寄生された葉には，種ごとに独特の食べ跡が残るため，寄主植物名とあわせて考えれば，ガの種類がわかることが多い。このように葉に幼虫の食べ進んだ跡のできる昆虫を，俗に字書き虫というが，これは潜葉性のガとは限らない。

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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