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Discusses the relationship of the Sub-Order Heterocera within the Order Lepidoptera. Thanks Felder for and congratulates him on his plates of the Heterocera.
Letter of introduction for Henry Deane, who is visiting Vienna.
Regrets he has no spare copies of a paper Felder has asked for, but will send him his "Notes on Eastern butterflies".
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Proposes to include a paper on the Hymenoptera of the Eastern Archipelago at a meeting of the Linnean Society. Will ARW read his own paper on the subject that evening.
Asks to change their appointment because of a prior engagement.
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