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To William Forsell Kirby 9 July [1863]
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.
| Author: | Charles Robert Darwin |
| Addressee: | William Forsell Kirby |
| Date: | 9 July [1863] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-4237 |
From W. F. Kirby 8 September [1863]
Summary
Describes some cases of geographical distribution of butterflies. Raises the perplexing question of the distribution of Pyrameis atalanta in Europe and P. calliroe in the Canaries.
| Author: | William Forsell Kirby |
| Addressee: | Charles Robert Darwin |
| Date: | 8 Sept [1863] |
| Classmark: | DAR 205.3 (Letters): 280 |
| Letter no: | DCP-LETT-4297 |
Author
| Darwin, C. R. | (1) |
| Kirby, W. F. | (1) |
Addressee
| Darwin, C. R. | (1) |
| Kirby, W. F. | (1) |
