But, if we proceed from a district where one Leptalis imitates an Ithomia, another mocking and mocked species, belonging to the same two genera, equally close in their resemblance, may be found.

Altogether no less than ten genera are enumerated, which include species that imitate other butterflies.

The mockers and mocked always inhabit the same region; we never find an imitator living remote from the form which it imitates.

The mockers are almost invariably rare insects; the mocked in almost every case abounds in swarms.

In the same district in which a species of Leptalis closely imitates an Ithomia, there are sometimes other Lepidoptera mimicking the same Ithomia: so that in the same place, species of three genera of butterflies and even a moth are found all closely resembling a butterfly belonging to a fourth genus.