From:
John Blackwall
To:
Charles Robert Darwin
Date:
12 Feb 1868
Source of text:
DAR 82: A78–9
Summary:
Variability of sizes and colours in spiders; on proportion of sexes; courtship of spiders.
Contributor:
Darwin Correspondence Project
From:
John Blackwall
To:
Charles Robert Darwin
Date:
18 Feb 1868
Source of text:
DAR 86: A2–3
Summary:
Proportion of sexes in spiders; coloration.
Contributor:
Darwin Correspondence Project
From:
John Blackwall
To:
Charles Robert Darwin
Date:
10 Aug 1869
Source of text:
DAR 82: 82–3
Summary:
Immature male spiders usually resemble in colour the females of their species of the same age. In some species colours of sexes differ when mature.
Contributor:
Darwin Correspondence Project
From:
John Blackwall
To:
Charles Robert Darwin
Date:
8 Sept 1869
Source of text:
DAR 82: A80–1
Summary:
His observations on young of Theridion lineatum reveal no characteristics distinguishing one from another;
quotes N. Westring on stridulation in Theridion serratipes [see Descent 1: 339].
Contributor:
Darwin Correspondence Project
