Contributions to the theory of natural selection. A series of essays ... By Alfred Russel Wallace ...

88 MIMICRY, AND OTIHER PROTECTIVE
there by P. mnomaus, the female of which so exactly
resembles it that they can hardly be separated in the
cabinet, and on the wing are quite undistinguishable.
But one of the most curious cases is the fine yellowspotted Papilio cbon, which is unmistakeably imitated
by the female tailed form of Papilio memnon. These
are both from Sumatra; but in North India P. coon
is replaced by another species, which has been named
P. doubledayi, having red spots instead of yellow;
and in the same district the corresponding female
tailed form of Papilio androgeus, sometimes considered
a variety of P. memnon, is similarly red-spotted. Mir.
Westwood has described some curious day-flying moths
(Epicopeia) from North India, which have the form
and colour of Papilios of this section, and two of these
are very good imitations of Papilio polydorus and
Papilio varuna, also from North India.
Almost all these cases of mimicry are from the
tropics, where the forms of life are more abundant,
and where insect development especially is of unchecked
luxuriance; but there are also one or two instances in
temperate regions. In North America, the large and
handsome red and black butterfly Danais erippus is
very common; and the same country is inhabited by
Limenitis archippus, which closely resembles the
Danais, while it differs entirely from every species of
its own genus.
The only case of probable mimicry in our own country is the following: —A very common white moth
(Spilosoma menthastri) was found by Mr. Stainton