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
- Letter no.
- Darwin, C. R.
- Walsh, B. D.
- Sent from
- Source of text
- Field Museum of Natural History, Chicago (Walsh 14)
- Physical description
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.
Please cite as
Darwin Correspondence Project, “Letter no. 6382,” accessed on 5 May 2016, http://www.darwinproject.ac.uk/DCP-LETT-6382