Excerpt from How to Know the Butterflies: Illustrated Keys for Determining to Species All Butterflies in North America, North of Mexico, With Notes on Their Distribution, Habits, and Larval Food, and Suggestions for Collecting and Studying ThemIt has become increasingly apparent to us over the last few years that there is a need for an inexpensive manual which will permit both the amateur butterfly collector and the professional entomologist to identify the species of North American butterflies.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.