To B. D. Walsh 21 September 1868
Down. | Bromley. | Kent. S.E.
Sep 21 1868
My dear Sir
I am very sorry that my book has never reached you, & so is Mr Murray, & he has proved his sorrow by sending off at his own cost by post this day another copy.1
I have much to thank you for: I have been glad to see Dr Scudder’s pamphlet (returned by this post) though it does not contain much.2
Judge Caton’s pamphlet is really admirable, & I have found in it much useful for my work.3
Pray thank Mr Riley for the extract about the peach trees. I have much pleasure in enclosing my photograph for him; but I do not like to take the liberty of applying to Prof. Westwood for his photograph.4
I am particularly obliged for your information about the stridulating organs; these certainly sometimes differ in the two sexes, but how far this is general I am unable to say.5
Your investigation about the Cicadas possesses extraordinary interest & the map will be a curiosity. How odd it is that individuals do not migrate from one area into another, & thus cause apparent confusion in the periods.6
I see that Scudder states that the Orthoptera stridulate differently by night & day; may not the “forced” Cicadas be dumb from coming out when the average temperature is too low;7 it wd be curious to ascertain whether the dumb individuals can breed.
With most sincere thanks for all your kindness— Believe me yours very truly | Ch. Darwin
Thanks BDW for pamphlets [by S. H. Scudder and J. D. Caton].
His information about Cicada is of extraordinary interest. Discusses stridulation organs which certainly sometimes differ in the sexes. CD would be curious to know if "dumb" Cicada can breed.
- Letter no.
- Darwin, C. R.
- Walsh, B. D.
- Sent from
- Source of text
- Field Museum of Natural History, Chicago (Walsh 14)
- Physical description
Please cite as
Darwin Correspondence Project, “Letter no. 6382,” accessed on 22 October 2016, http://www.darwinproject.ac.uk/DCP-LETT-6382