Shiokara tomfly (salted dragonfly) - Shiokara tomfly (English spelling) Orthetrum albistylum speciosum

Japanese: シオカラトンボ(塩辛蜻蛉) - シオカラトンボ（英語表記）Orthetrum albistylum speciosum

An insect of the order Odonata, family Lithoda (illustration). This is the most common dragonfly found on the plains of the Japanese archipelago, and can be found from Hokkaido to the southern tip of the Ryukyu Islands, and also in various parts of China and Taiwan, but is not found in Southeast Asia or eastern Siberia. However, a smaller original subspecies is known from Central Asia to Southern Europe. Body length is 50-55 mm. Females are commonly called straw-colored dragonflies, but even immature males are straw-colored, and only males turn black and develop white powder as they mature. The larvae grow in various shallow puddles on the plains, and are short-legged nymphs with bristly skin on their bodies.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

トンボ目トンボ科の昆虫（イラスト）。日本列島の平地産のもっともふつうなトンボで，北海道から琉球諸島の南端まで，さらに中国各地，台湾にも見られるが，東南アジアや東シベリアには産しない。ただし中央アジアから南ヨーロッパにかけてはもっと小型の原亜種が知られている。体長50～55mm。雌を俗にムギワラトンボと称するが，雄でも未熟個体は麦わら色で，雄だけが成熟によって黒化し白粉を生ずる。幼虫は平地の各種の浅い水たまりに成育し，体表に剛毛を生じた肢の短いヤゴである。

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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