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  1. By: Chapco, William, - Riegert, Paul W
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 67
    Issue: 2
    Date: 1991
    Page Range: 81--85
    Publication Info: San Francisco, Pacific Coast Entomological Society,
  2. By: Mitchell, George J. - Riegert, Paul W
    Type: Article
    In: The Canadian field-naturalist
    Volume: 108
    Issue: 3
    Date: 1994
    Page Range: 288--291
    Publication Info: Ottawa Ottawa Field-Naturalists' Club