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Has sent copy of his paper on the Papilionidae. Regrets complications of synonymy arising from Felder publishing ARW's new discoveries as part of Felder's Voyage of the Novara. This produces issues as to priority of names. Includes concordance list of Lepidoptera species described by both Felder and ARW.
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About the confusion between them over the naming of butterfly species. Looks forward to receiving Felder's work on the Pieridae and Danaidae butterflies and will occupy himself with the latter group.
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Is preparing a paper on the Pieridae and will arrange all the species of tropical Asia, the Malay Islands and Australia and describe all the new species in the chief English collections.
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