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Wallace, Alfred Russel, 1823-1913

"Darwinism (1889)"

" Mr. Forbes then goes on to
describe the exact appearance of such excreta, and how the various parts
of the spider are coloured to produce the imitation, even to the liquid
portion which usually runs a little down the leaf. This is exactly
imitated by a portion of the thin web which the spider first spins to
secure himself firmly to the leaf; thus producing, as Mr. Forbes
remarks, a living bait for butterflies and other insects so artfully
contrived as to deceive a pair of human eyes, even when intently
examining it.[79]
A native species of spider (Thomisus citreus) exhibits a somewhat
similar alluring protection by its close resemblance to buds of the
wayfaring tree, Viburnum lantana. It is pure creamy-white, the abdomen
exactly resembling in shape and colour the unopened buds of the flowers
among which it takes its station; and it has been seen to capture flies
which came to the flowers.
But the most curious and beautiful case of alluring protection is that
of a wingless Mantis in India, which is so formed and coloured as to
resemble a pink orchis or some other fantastic flower.


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