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Sends a preliminary reply to CD’s query [5890]. Ten males to one female among captured micro-Lepidoptera. Six females to four or five males in those he has bred. HTS is aware this is diametrically opposed to information from [Alexander] Wallace and Bates, but the true proportion of sexes can only be ascertained by breeding.
Protective coloration in butterflies.
[Alexander] Wallace’s suggestion that collecting larger larvae of females accounts for error in counting proportion of sexes.
On butterfly scales: there are many secondary characters which baffle conjecture.
Was forced to make additions to Origin as short as possible.
Replies to CD on proportion of sexes in butterflies, coloration of moths, and courtship. Encloses copies of letters on these subjects between HTS, Henry Doubleday, and John Hellins.