THE SWALLOWTAILS AND THEIR ALLIES
The family Papilionidae includes many of the commonest and showiest of our butterflies. The adults of both sexes have six ambulatory feet; the caterpillars are elongate; the chrysalids are attached at the tail and held in place by a silken girdle, but never fastened close to the supporting surface, as the Lycaenids are. The Papilionidae is divided into two subfamilies: the Pierinae and the Papilioninae.