About two weeks after the clusters of eggs are thus laid upon the twigs of the food plant, they hatch into small blackish caterpillars, each emerging from the egg shell through a small hole that it eats out of the upper surface. They thus enter upon the second stage in their life-history—the larva or caterpillar stage. As soon as hatched, they crawl to the nearest leaf upon which they range themselves side by side, with their heads toward the margin of the leaf. They feed in this position, nibbling at the green surface of the leaf-blade and leaving the network of veins untouched.
See [page 76]
THE ZEBRA SWALLOWTAIL
Summer form: upper surface, above; under surface, below
From a drawing by Mary E. Walker
See [Page 101]
THE CLOUDED SULPHUR BUTTERFLY
Caterpillar and butterfly on red clover plant. (Reduced)