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The Descent of Man

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1866, p. xlv.), especially by Mr. Belt. Hence Mr.<br />

Bates inferred that the butterflies which imitate<br />

the protected species have acquired their present<br />

marvellously deceptive appearance<br />

through variation and natural selection, in order<br />

to be mistaken for the protected kinds, and<br />

thus to escape being devoured. No explanation<br />

is here attempted <strong>of</strong> the brilliant colours <strong>of</strong> the<br />

imitated, but only <strong>of</strong> the imitating butterflies.<br />

We must account for the colours <strong>of</strong> the former<br />

in the same general manner, as in the cases<br />

previously discussed in this chapter. Since the<br />

publication <strong>of</strong> Mr. Bates' paper, similar and<br />

equally striking facts have been observed by<br />

Mr. Wallace in the Malayan region, by Mr.<br />

Trimen in South Africa, and by Mr. Riley in the<br />

United States. (31. Wallace, 'Transact. Linn.<br />

Soc.' vol. xxv. 1865 p. i.; also, 'Transact. Ent.<br />

Soc.' vol. iv. (3rd series), 1867, p. 301. Trimen,<br />

'Linn. Transact.' vol. xxvi. 1869, p. 497. Riley,<br />

'Third Annual Report on the Noxious Insects <strong>of</strong><br />

Missouri,' 1871, pp. 163-168. This latter essay is

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