The Probert Encyclopaedia of Nature

PIERIDAE

Pieridae is the whites and sulphurs or yellows family of butterflies, containing some 1500 species mostly white or yellow in colour. They are mostly medium sized butterflies with convex-shaped inner borders to the hind wings. The different sexes usually differ in colour and the caterpillars are often thickly covered with short hair, and their body narrowed at both ends. The pupae, similar to the Swallowtails, are suspended head upwards and secured with a silk girdle.
Research Pieridae