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Darwin, C. R. in correspondent 
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DCP-LETT-5194

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
20 Aug [1866]
Source of text:
Field Museum of Natural History, Chicago (Walsh 5)
Summary:

On various subjects: Dana’s misquotations,

H. J. Clark’s book Mind in nature [1865],

BDW’s Cynips experiments, galls,

Balbiani’s paper on aphids ["Sur la reproduction et l’embryogénie des pucerons", C. R. Hebd. Acad. Sci. 62 (1866): 1231–4, 1285–9, 1390–4].

Claus and other Germans testing CD’s views of variability in common lower animals.

Contributor:
Darwin Correspondence Project

DCP-LETT-5320

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
24 Dec [1866]
Source of text:
Field Museum of Natural History, Chicago (Walsh 8)
Summary:

Balbiani’s puzzling observations on Aphis.

Contributor:
Darwin Correspondence Project

DCP-LETT-5455

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
23 Mar [1867]
Source of text:
Field Museum of Natural History, Chicago (Walsh 9)
Summary:

Thanks for Agassiz’s Lectures. Lyell does not believe a word about glacial action of any kind in lowlands of Brazil. Agassiz’s view of glacial movement has been given up by physicists.

Contributor:
Darwin Correspondence Project

DCP-LETT-5482

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
3 Apr [1869]
Source of text:
Field Museum of Natural History, Chicago (Walsh 17)
Summary:

Glad BDW has proved his case on dimorphism of Cynips.

Interested in galls

and BDW’s Cicada articles [Proc. Entomol. Soc. Philadelphia (1864)].

Contributor:
Darwin Correspondence Project

DCP-LETT-5603

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
9 Aug [1867]
Source of text:
Field Museum of Natural History, Chicago (Walsh 15)
Summary:

Is not sure he thinks so much of BDW’s argument in his last paper as of some others he advanced. Is BDW sure Lucanidae use jaws for holding female in copulation rather than for fighting other males?

Contributor:
Darwin Correspondence Project

DCP-LETT-5803

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
27 Jan [1868]
Source of text:
Field Museum of Natural History, Chicago
Summary:

Is sending a copy of Variation [to be published in a few days]. It cost more labour than it is worth.

George Darwin is Second Wrangler.

Contributor:
Darwin Correspondence Project

DCP-LETT-5876

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
14 Feb 1868
Source of text:
Field Museum of Natural History, Chicago (Walsh 12)
Summary:

Requests entomological data on sexual selection, especially proportions of sexes.

Sends Queries about expression with note: "a great hobby of mine".

Contributor:
Darwin Correspondence Project

DCP-LETT-5883

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
17 Feb [1868]
Source of text:
Field Museum of Natural History, Chicago (Walsh 12A)
Summary:

Has looked through BDW’s papers and finds heaps of facts on sexual differences. Asks questions on sexual differences in particular species.

Contributor:
Darwin Correspondence Project

DCP-LETT-6113

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
13 Apr [1868]
Source of text:
Field Museum of Natural History, Chicago
Summary:

BDW’s letter [6051?] and his notes are a "mine of wealth". The negative evidence is of much value. Sexual selection is a perplexing subject – finds he "must make the best of a rather bad job".

Sends copy [of Variation].

Contributor:
Darwin Correspondence Project

DCP-LETT-6236

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
9 June 1868
Source of text:
Field Museum of Natural History, Chicago (Walsh 13)
Summary:

Thanks BDW for new facts about Anthocaris [see 6156].

Asks BDW to observe stridulation apparatus in male and female lamellicorns.

Contributor:
Darwin Correspondence Project

DCP-LETT-6382

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
21 Sept 1868
Source of text:
Field Museum of Natural History, Chicago (Walsh 14)
Summary:

Thanks BDW for pamphlets [by S. H. Scudder and J. D. Caton].

His information about Cicada is of extraordinary interest. Discusses stridulation organs which certainly sometimes differ in the sexes. CD would be curious to know if "dumb" Cicada can breed.

Contributor:
Darwin Correspondence Project

DCP-LETT-6437

From:
Charles Robert Darwin
To:
Benjamin Dann Walsh
Date:
31 Oct 1868
Source of text:
Field Museum of Natural History, Chicago (Walsh 16)
Summary:

Thanks BDW for extracts about "drumming" [of male Cicada to attract females].

Asa Gray and Hooker doubt that 13–year and 17–year Cicada forms should be considered distinct species. CD is inclined to agree with them.

Suggests observations be made of ratio of females to males in the rarer form.

Contributor:
Darwin Correspondence Project
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