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Updated: May 4, 2025
Whirligig beetles are said to be particularly destructive to Anopheles larvæ and many other insects such as water-boatmen, back-swimmers, etc., feed on the larvæ of various species. A few of these introduced into a breeding-jar with Anopheles larvæ will soon destroy all of them, even the very young bugs attacking larvæ much larger than themselves.
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