Caddisfly (Caddisfly)

Japanese: トビケラ(飛螻蛄) - トビケラ（英語表記）caddisfly

A general term for insects in the order Trichoptera. The name Trichoptera comes from the fact that their wing membranes are densely covered with hair compared to other insects. They are found all over the world except for the polar regions and marine areas because their larvae are freshwater. Adults are small to medium in size, with a body length of 0.2 to 40 mm. At first glance, they resemble moths, but they can be distinguished by the fact that when at rest, they stretch their long antennae forward and fold their wings into a roof shape. Most have yellow, brown, or blackish brown wings with no noticeable markings, but some have orange-yellow, indigo, or white markings (purple caddisflies).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

毛翅目Trichopteraの昆虫の総称。翅膜が他の昆虫に比べて毛に濃くおおわれているので毛翅類の名がある。両極地域と幼虫が淡水性のため海水域を除き地球上のいたるところに分布している。成虫は小型ないし中型で，体長0.2～40mm。一見ガに似ているが，静止の際には長い触角を前方にのばし翅を屋根型にたたむので区別がつく。翅色は黄色，褐色または黒褐色で顕著な斑紋がないものが多いが，なかには橙黄色，藍色，白色などの斑紋をもっているものもある(ムラサキトビケラ)。

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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