Abstract
DURING the discussion on Mimicry at the last meeting of the Entomological Society, the fact that so many mimetic species are scarce, in comparison with the non-mimetic allies and the models, was brought forward as an argument against the efficiency of mimetic resemblance. Amongst the Indo-Australian Papilios this phenomenon is strikingly illustrated by Papilio alcidinus and caunus, which resemble their models to a surprising degree. As both these rare species deviate widely from their nearest relatives, it occurs to me that the theory of Mimicry, which says that Homœochromatism and Homœomorphism between imitating and imitated species are the outcome of selection, can give a satisfactory explanation of the scarcity of individuals of mimetic forms.
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