From:
Charles Robert Darwin
To:
William Forsell Kirby
Date:
9 July [1863]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:
CD is particularly struck by WFK’s observations on Corsican and N. American subspecies in his paper ["On the geographical distribution of European Rhopalocera", Trans. R. Entomol. Soc. Lond. 3d ser. 1 (1862–3): [!?bib has 1862–4] 481–92]. Thinks it would be interesting for WFK to examine specimens from the Shetland Islands, for even faint trace of differentiation.
Contributor:
Darwin Correspondence Project