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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mason, P W
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 26
    Date: 1924
    Page Range: 49--52
    Publication Info: Washington, etc, Entomological Society of Washington,
  2. By: Mason, P W
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 49
    Date: 1947
    Page Range: 252--254
    Publication Info: Washington, etc, Entomological Society of Washington,
  3. By: Mason, P W
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 39
    Date: 1937
    Page Range: 166--167
    Publication Info: Washington, etc, Entomological Society of Washington,
  4. By: Mason, P W
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 25
    Date: 1923
    Page Range: 188--190
    Publication Info: Washington, etc, Entomological Society of Washington,