To Frederick Smith   12 March 1878

Down, | Beckenham, Kent. | Railway Station | Orpington. S.E.R.

March 12 1878

My dear Mr Smith,

I have thought that the enclosed specimens might interest you. As far as my ignorance permits me to judge, the great difference in the casts of workers seems very curious; & some of Mrs Treats observations on their habits.1 She has done some good work with plants.2 I do not want either the specimens or note returned. Should the facts be sufficiently new, I do not doubt that she would be much gratified by your mentioning the fact before the Entomological Society.3

Yours sincerely | Charles Darwin

No letter from Mary Treat about the ant specimens has been found. Treat later wrote on the anatomy and behaviour of harvesting ants (Treat 1879).
CD had corresponded with Treat about insectivorous plants (see Correspondence vols. 19–24); he cited her published work on Drosera filiformis (thread-leaved sundew) and Utricularia (bladderwort) in Insectivorous plants, pp. 281 and 408.
Smith was a member of the Entomological Society of London.

Please cite as “DCP-LETT-11418A,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-11418A