Mimicry in Insects (19th century; restoration by Ptera Hunter, 2020). This plate contains different mimicking insects. Plates like these challenged the 19th century reader to find as many of the creatures as possible, thus discovering their various deceptions. Check it out and see how many you see before scrolling down to the key. challenged the 19th century reader to find as many insects as possible, thus discovering the various kinds of camouflage.