Chrysopidae - Chrysopidae

…This word was introduced to Japan with the introduction of Buddhism, and is generally used as an analogy for something rare, as the “Udongara flower.” [Yoshioka Shiro] The eggs of lacewings are generally called udonge in Japan. They have long oval eggs at the end of thread-like stalks, and have been considered to be of plant origin since ancient times, and have been considered to be a sign of good or bad luck. …

*Some of the terminology that refers to the family Chrysopidae is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…仏教の伝来とともに日本にもこの語は伝わり，〈優曇華の花〉として一般に稀有なことがらのたとえに用いられる。【吉岡 司郎】　クサカゲロウ科の昆虫の卵は日本では一般にうどんげと呼ばれる。糸状の柄の先に長楕円形の卵をつけ，古来植物性のものとみなされ，吉事または凶事の兆しとされてきた。…

※「クサカゲロウ科」について言及している用語解説の一部を掲載しています。

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