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Westwood, John Obadiah. 1839-1840. An introduction to the modern classification of insects. 2 vols. London: Longman, Orme, Brown, Green & Longmans. vol. 1 vol. 2
Walsh, Benjamin Dann. 1864. On certain entomological speculations of the New England school of naturalists. [Agassiz] Proceedings of the Entomological Society of Philadelphia 3: 207-249. [Darwin Pamphlet Collection 335]
Walsh, Benjamin Dann. 1863. Observations on certain North American Neuroptera, by H. Hagen, M.D., of Koenigsberg, Prussia; translated from the original French MS., and published by permission of the author, with notes and descriptions of about twenty new species of North American Pseudoneuroptera. Proceedings of the Entomological Society of Philadelphia 2: 167-272. [inscribed][Darwin Pamphlet Collection 336]
Kirby, William and Spence, William. 1815-1826. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4 |
