Thread-waisted wasp (Jigabachi)

Japanese: ジガバチ(似我蜂) - ジガバチ（英語表記）thread‐waisted wasp

An insect (illustration) belonging to the Hymenoptera family of Digger wasps. The body is black, the abdomen is indigo blue, and the second abdominal segment is reddish brown. It is a slender wasp with a body length of about 20 mm and a thin abdominal stalk. It is found in Japan, Ussuri, northern China, and the Korean Peninsula. It hunts lepidopteran larvae such as cutworms, cabbage white butterflies, and looper worms. It digs holes in the ground and buries its prey to feed its larvae. It makes a buzzing sound with its wings when digging. It was named jigabachi because people in the past thought that if they buried caterpillars, they would emerge as wasps, saying "jigajiga."

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

膜翅目アナバチ科(＝ジガバチ科)に属する昆虫（イラスト）。体は黒色で，腹部は藍色を帯び第2腹節は赤褐色。体長約20mmの細長いハチで腹柄は細い。日本，ウスリー，中国北部，朝鮮半島に分布する。ヨトウムシ，モンシロチョウ，シャクトリムシなど鱗翅目の幼虫を狩る。地中に穴を掘り獲物を埋めて幼虫の餌にする。土を掘るとき翅をジイジイと鳴らす。昔の人がジガジガといって青虫を埋めるとハチになって出てくると思いジガバチと名づけたという。

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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