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  1. By: Ridgway., Robert
    Type: Article
    In: Ibis
    Volume: 2
    Series: 5
    Issue: 1
    Date: 1884
    Page Range: 27--28
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Ridgway., Robert
    Type: Article
    In: Ibis
    Volume: 4
    Series: 5
    Issue: 4
    Date: 1886
    Page Range: 460--461
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,