[The ichneumon wasp] drops an egg. She next seeks out a small green caterpillar inhabiting the leaves of the cabbage-plant, which she punctures with her sting, yet so slightly and delicately as not to kill it; she then rolls it up into a circle, and places it in the sandy nest, immediately over the egg. She continues the same labour till she has counted twelve, and deposited twelve caterpillars, one over another; and thus repeats the process of ovation and supply, till she has exhausted herself of her entire stock of eggs.