Batesian, [9];

Müllerian, [14]

Mimicry rings, [65];

in S. American butterflies, [134];

and natural selection, [136]

Mimicry theory, difficulties of, [139]

Monkeys, as enemies of butterflies, [121]

Moths, mimicry in, [27], [36]

Moulton, on S. American mimicry rings, [134]

Müller, [14], [72]