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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Dietz, William G
    Type: Article
    In: Transactions of the American Entomological Society
    Volume: 18
    Date: 1891
    Page Range: 177--276
    Publication Info: Philadelphia, The Society at the Academy of Natural Sciences, 1890-
  2. By: Dietz, William G
    Type: Article
    In: Transactions of the American Entomological Society
    Volume: 23
    Date: 1896
    Page Range: 387--480
    Publication Info: Philadelphia, The Society at the Academy of Natural Sciences, 1890-