To Raphael Meldola 27 January [1872]
Pray keep the specimens as long as you wish.— I have read your letter with interest & pleasure.— I have vague recollection of Mr Trimen in Transact. Linn. Soc. or of Mr Butler of Brit. Mus. mentioning the case of ♂ alone mimicking some other Butterfly.
C. Darwin
Down. Jan. 27th