The butterfly guide

Chapter 80: Family PAPILIONIDÆ (The Swallow-tails and Allies).

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About This Book

A concise field manual for identifying common North American butterflies, presenting 295 colored figures that depict 255 species and varieties alongside succinct descriptions of wing patterns, sizes, ranges, and habits. The text opens with accessible explanations of butterfly anatomy, classification, and life history, then provides practical, field-oriented identification guidance, often illustrating only a single wing side or half when adequate. Emphasis is on clear visual comparison, terminology, and observation tips to assist naturalists and beginners in recognizing and distinguishing species across the United States and Canada.

Family PAPILIONIDÆ
(The Swallow-tails and Allies).

The butterflies of this group are provided in both sexes with six legs adapted to walking. The internal vein of the hind wing is wanting, its place being taken by the submedian. Caterpillars elongate, and in the genus Papilio provided with osmateria or protrusive forking scent-organs, which, when excited, they thrust forth from the pouch back of the head in which they usually lie concealed. Chrysalids in all the genera more or less elongate, attached at anal extremity to a button of silk, and held in place by a silk girdle, but never closely appressed to the supporting surface as is the case in the Erycinidæ and Lycænidæ.