To Henry Doubleday 1 March [1868]
Summary
Has been interested in copy of HD’s letter to H. T. Stainton on numerical proportions of the sexes of insects. Do they vary during different years?
Does he have opinions about the courtships of butterflies?
Will send a copy of his paper on Primula when it is published. [See 5997.]
| Author: | Charles Robert Darwin |
| Addressee: | Henry Doubleday |
| Date: | 1 Mar [1868] |
| Classmark: | George W. Platzman (private collection) |
| Letter no: | DCP-LETT-5966A |
To Henry Doubleday 20 March [1868]
Summary
CD asks about HD’s observation of sexual call of Coleoptera.
Also comments on statements by collectors that they breed more females than males from caterpillars. CD had thought this might be accounted for by the collection of largest and finest caterpillars, but Alexander Wallace says the collectors take large and small equally. Does HD agree with Wallace?
| Author: | Charles Robert Darwin |
| Addressee: | Henry Doubleday |
| Date: | 20 Mar [1868] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-6027 |
To Henry Doubleday 15 April [1868]
Summary
Submits lists of insects [missing] for correspondent to check whether brightly coloured. Wants to determine whether there is any relation between bright colouring, whether in both sexes or one alone, and an unequal number of males and females.
| Author: | Charles Robert Darwin |
| Addressee: | Henry Doubleday |
| Date: | 15 Apr [1868] |
| Classmark: | DAR 82: 121-2 |
| Letter no: | DCP-LETT-6123 |
| letter | (3) |
| Doubleday, Henry | (3) |
