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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Darwin, Charles, - Dieffenbach, E.
    Type: Article
    In: Entomologische Zeitung
    Volume: 27
    Date: 1866
    Page Range: 362--364
    Publication Info: [Stettin Entomologischer Verein zu Stettin 1840-1911]