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  1. Synopsis of the families and genera of the Hymenoptera of America, north of Mexico, together with a catalogue of the described species, and bibliography
    Publication info: [Philadelphia, P.C. Stockhausen, Printer], 1887
  2. Transactions of the American Entomological Society and proceedings of the Entomological Section of the Academy of Natural Sciences
    Publication info: Philadelphia, The Society, 1878-1889