Stridulating organ

Japanese: 摩擦器 - まさつき(英語表記)stridulating organ
Stridulating organ
The sound-producing organ of insects consists of a specialized file-like part on the body wall and a friction piece that protrudes from the other body parts adjacent to it. In grasshoppers, the differentiation of the file-like part and the friction piece is not so obvious, and they produce a simple sound by rubbing the thickened part of the forewing with a row of tiny projections on the inside of the hind leg femur. Male crickets and grasshoppers have highly developed friction apparatus on their wings, allowing them to produce unique and beautiful songs. In crickets, the right forewing is placed on top and the left forewing is placed underneath, and when singing, the two forewings are raised at various angles and the file-like part engraved along the vein on the underside of the right forewing is rubbed with the friction piece on the rear edge of the left forewing.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
体壁の一部が特殊化したやすり状部と,これに接する他の体部に隆起した摩擦片とからなる昆虫類の発音器官。バッタ類ではやすり状部と摩擦片の分化があまり顕著でなく,後脚腿節の内側に1列に並ぶ微小突起で前翅の翅脈厚化部をこすって単純な音を発する。コオロギ,キリギリス類の雄の翅には高度に発達した摩擦器があって,独特の美しい歌を奏でることができる。コオロギ類では右前翅が上に,左前翅がその下に重ねられており,鳴くときには2枚の前翅をいろいろの角度に立てて,右前翅下面の翅脈に沿って刻まれたやすり状部を左前翅の後縁にある摩擦片でこする。

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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