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From Henry Walter Bates   11 March 1867



Sexual ornamentation of insects: coloration of Epicalia genus [of tropical S. American butterflies];

horned genera of lamellicorn beetles [see Descent 1: 370, 388].

Wallace brought CD’s question about gay-coloured caterpillars before the Entomological Society. Members now seeking explanations.

Author:  Henry Walter Bates
Addressee:  Charles Robert Darwin
Date:  11 Mar 1867
Classmark:  DAR 82: A36–9, A46–7
Letter no:  DCP-LETT-5438

From H. W. Bates   29 March 1867



Working on sexual differences in collection of horned beetles and will send CD results.

Answers CD’s questions [sent on behalf of Miss Tollet of Betley Hall, Staffs.] on mimicry – how it helps prevent extinction, the modifications occurring with a change of habitat until mimicry occurred.

Also gives some cases of sexual differences.

Author:  Henry Walter Bates
Addressee:  Charles Robert Darwin
Date:  29 Mar 1867
Classmark:  DAR 205.10: 95 (Letters)
Letter no:  DCP-LETT-5474

To H. W. Bates   30 March [1867]


Would like tabulation of horned beetles if not too troublesome, but would easily settle for general remarks.

On the subject of other species mocking Heliconidae, asks whether full-coloured ones were mocked. Expresses full belief in HWB’s theory.

Encloses a copy of A. R. Wallace’s letter to the Field requesting observations on which caterpillars birds devour.

Author:  Charles Robert Darwin
Addressee:  Henry Walter Bates
Date:  30 Mar [1867]
Classmark:  Cleveland Health Sciences Library (Robert M. Stecher collection), FF7
Letter no:  DCP-LETT-5476
Document type
letter (3)