Definition of "whirlwig" []

• A whirligig beetle. (noun)

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• "Early in March, before the first male canker-moth appears on the elm-tree, the whirlwig beetles have begun to play round the broken edges of the ice, and the caddis-worms to crawl beneath it; and soon come the water-skater _ (Gerris) _ and the water-boatman _ (Notonecta) _."