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Darwin Correspondence Project

DCP-LETT-2284

From John Lubbock   10 June 1858

High Elms, | Farnborough, | Kent.

10 June 58

Dear Mr Darwin

I hope you are better. Many thanks for the Queen Bee larva & Pupa which will be very useful some day. [DIAGRAMS HERE] C. persicæ? 1 b a b C. hesperidum 2 b a a b

The above two figures represent the posterior part of the subœsophageal ganglion, in the two species of Coccus whose nervous system I have examined.1 In C. persicæ? the ganglion end like a trident, whose 3 teeth pass gradually into the central stem and two lateral nerves.

In some specimens of both species I have seen the nerve a rise directly from the ganglion and not from the nerve b.2

Believe me | Yours most sincerely | J Lubbock C Darwin Esq

Footnotes

1
John Lubbock was preparing a paper on the digestive and nervous systems of the insect Coccus hesperidum (Lubbock 1858). His paper was read at a meeting of the Royal Society on 18 November 1858. An offprint of the paper marked by CD is in the Darwin Pamphlet Collection–CUL.
2
CD was impressed to hear that important organs like nerves were subject to variation in their number and position. Lubbock’s information was cited in Origin, p. 46.

Summary

Thanks for queen-bee larva and pupa.

Nervous system of Coccus.

Letter details

Letter no.
DCP-LETT-2284
From
Lubbock, John
To
Darwin, C. R.
Sent from
High Elms
Source of text
DAR 170: 21
Physical description
2pp

Please cite as

Darwin Correspondence Project, “Letter no. 2284,” accessed on 29 July 2016, http://www.darwinproject.ac.uk/DCP-LETT-2284

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