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From George Robert Crotch   2 October [1868]

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Summary

Bibliographical references on [stridulation in] Coleoptera. Finds no idea of sex has occurred to authors [i.e., they do not find the stridulating organs differing according to sex; cf. Descent 1: 378–85].

Author:  George Robert Crotch
Addressee:  Charles Robert Darwin
Date:  2 Oct [1868]
Classmark:  DAR 82: A98
Letter no:  DCP-LETT-6407

From G. R. Crotch   [after 5 October 1868]

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Summary

Note identifying insects and remarking on stridulation.

Author:  George Robert Crotch
Addressee:  Charles Robert Darwin
Date:  [after 5 Oct 1868]
Classmark:  DAR 81: 173
Letter no:  DCP-LETT-6529

From G. R. Crotch   [after 16 October 1868]

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Summary

Lists stridulating organs of various Coleoptera.

Author:  George Robert Crotch
Addressee:  Charles Robert Darwin
Date:  [after 16 Oct 1868]
Classmark:  DAR 81: 124
Letter no:  DCP-LETT-6530
Document type
letter (3)
Author
Crotch, G. R.[X]
Addressee
Correspondent
Date
1868
10
02 (1)
05 (1)
16 (1)
letter