From Francis Walker 6 July [1838]
Summary
Thanks CD for suggestions for improving his descriptions of species by indicating localities. With few exceptions the Chalcidites of South America and Australia are remarkably like European species.
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 6 July [1838] |
| Classmark: | DAR 205.3: 293 |
| Letter no: | DCP-LETT-421 |
From Francis Walker 10 December 1843
Summary
Chalcidites collected by CD are all similar to those of Europe. Mentions other specimens quite different from European forms.
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 10 Dec 1843 |
| Classmark: | DAR 205.3: 294 |
| Letter no: | DCP-LETT-721 |
From Francis Walker 24 June [1862]
Summary
Identified two flies as species of Empis that suck flowers, but the females also feed on small Diptera.
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 24 June [1862] |
| Classmark: | DAR 70: 182 |
| Letter no: | DCP-LETT-10547 |
From Francis Walker 26 February 1863
Summary
Identifies flies sent to him by CD. [CD note states that these were found with orchid pollinia adhering to them.]
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 26 Feb 1863 |
| Classmark: | DAR 181: 3 |
| Letter no: | DCP-LETT-4014 |
From Francis Walker 1 February 1861
Summary
Identifies two dipterous species of parasites [chalcidites].
Was not able to attend to the aphids last year, but will make use of CD’s suggestions and "study as much as I can the inquiry as to species".
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 1 Feb 1861 |
| Classmark: | DAR 46.2 (ser. 3): 54–5 |
| Letter no: | DCP-LETT-3053 |
From Francis Walker 9 December 1867
Summary
The horns and spines of homopterous insects do not vary between sexes. Sexual differences in Blattidae.
| Author: | Francis Walker |
| Addressee: | Charles Robert Darwin |
| Date: | 9 Dec 1867 |
| Classmark: | DAR 82: A48–9 |
| Letter no: | DCP-LETT-5718 |
| letter | (6) |
| Darwin, C. R. | (6) |
| Darwin, C. R. | (6) |
| Walker, Francis | (6) |
