Leaf hopper (horizontal creeping) - Leaf hopper (English spelling)

Japanese: ヨコバイ(横這) - ヨコバイ（英語表記）leaf hopper

A general term for insects in the superfamily Cicadelloidea in the order Hemiptera. When it comes to pests, planthoppers and leafhoppers are often referred to as one of the most common insect groups that damage agricultural crops. They are called leafhoppers because they crawl sideways, but they can also jump with their hind legs and are skilled at flying using their wings, with many species arriving at lights at night. Over 4,000 species are known worldwide. Most species are small, with body lengths of around 3 to 5 mm, and even the largest species are few, with only a few exceeding 10 mm.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

半翅目ヨコバイ上科Cicadelloideaの昆虫の総称。害虫といえば，ウンカ･ヨコバイ類といわれるほど，農作物を加害する代表的な昆虫の一群である。横にはうからヨコバイと呼ばれるが，横にはうばかりでなく，後脚によりピョンとはねることもあり，また翅をつかって飛ぶことも巧みで，夜間に灯火に飛来する種も少なくない。世界より4000種以上が知られる。体長は3～5mmほどの小型の種が多く，大きな種でも10mmを超す種は少ない。

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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