My dear Mr Stainton
As you said you would be so good as to write again I trouble you with one other question.2 I want to distinguish, as far as I can, sexual & protective colouring. Now do the females of the common Brimstone & common Orange-tips emerge from their cocoons & haunt the same places, mingled with large & small Cabbage Butterflies, for which, it is possible, they might be mistaken by birds, & thus escape danger.—3
Yours very sincerely | Ch. Darwin
Please cite as “DCP-LETT-5949,” in Ɛpsilon: The Charles Darwin Collection accessed on