Mantidae

…They are highly predatory even from the time they are larvae, and prey on many small insects during their lifetime, making them valuable as beneficial insects. Japanese mantises are divided into two families, the Mantidae and the Hymenopodidae. Both have sickles formed by the modification of the parts of their front legs beyond the femurs. …

*Some of the terminology that mentions "Mantidae" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…幼虫時から捕食性が強く，一生の間に多量の小昆虫を捕食し，いわゆる益虫としての価値が高い。　日本のカマキリ類はカマキリ科Mantidaeとヒメカマキリ科Hymenopodidaeの2科よりなる。いずれも前脚の腿節より先の部分が変形してできた鎌を備える。…

※「Mantidae」について言及している用語解説の一部を掲載しています。

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