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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Beckwith, Charles S
    Type: Article
    In: Journal of the New York Entomological Society
    Volume: 37
    Date: 1929
    Page Range: 409--416
    Publication Info: Lawrence, Kan Allen Press [etc.]
  2. By: Beckwith, Charles S - Hutton, Sidney B
    Type: Article
    In: Journal of the New York Entomological Society
    Volume: 37
    Date: 1929
    Page Range: 425--427
    Publication Info: Lawrence, Kan Allen Press [etc.]
  3. By: Weiss, Harry B. (Harry Bischoff), - Beckwith, Charles S
    Type: Article
    In: The Canadian entomologist
    Volume: 53
    Date: 1921-02
    Page Range: 44--45
    Publication Info: Ottawa [etc.], Entomological Society of Canada [etc.],
  4. By: Headlee, Thomas J. (Thomas Jefferson), - Beckwith, Charles S
    Type: Article
    In: Annals of the Entomological Society of America
    Volume: 10
    Date: 1917
    Page Range: 211--218
    Publication Info: [College Park, Md., etc.], Entomological Society of America,