River dragonfly (Mnais pruinosa)

Japanese: カワトンボ(河蜻蛉) - カワトンボ(英語表記)Mnais pruinosa
River dragonfly (Mnais pruinosa)
An insect of the order Odonata, family Coleoptera. Body length is about 50 mm. Both males and females have metallic green bodies, with males having transparent, orange-yellow or orange-red, or reddish brown wings, while females usually have transparent wings. Mature males have white powder on their bodies. Both species emerge early in spring and disappear in summer except in mountainous areas. They are distributed in Hokkaido, Honshu, Shikoku, Kyushu, and Oki. In Japan, they are divided into three subspecies: Nishikawatombo (illustration), Higashikawatombo (illustration), and Okawatombo. However, Nishikawatombo and Okawatombo are often found in western Japan, and two of these three subspecies are often found mixed in central Honshu.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
トンボ目カワトンボ科の昆虫。体長約50mm。雄雌とも金属緑色の体に,雄は透明,または橙黄色ないし橙赤色,あるいは赤褐色の翅をもち,雌では通常透明翅を有する。成熟した雄は体に白粉を帯びる。いずれも春季早く出現して,夏季には山間を除いて姿を消す。北海道,本州,四国,九州,隠岐に分布する。日本ではニシカワトンボ(イラスト),ヒガシカワトンボ(イラスト),オオカワトンボの3亜種に分けられるが,西日本ではニシカワトンボとオオカワトンボが,本州中部ではこれら3亜種のうち2亜種が混生する場合が多い。

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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