Excerpt from A Monograph of the Sphingidae of America, North of Mexico I have drawn liberally for my descriptions on Prof. F ernald's work, and have freely reproduced the original descriptions of larvae and imagos where they were sufficiently full, in all cases, however, comparing them with the insects themselves where possible. Prof. Riley has very kindly placed at my disposal all his notes in the family, and I have made use of them in many cases to solve doubts, without special acknowledgement. There is hardly a collector or collection that has not in some way contributed or aided in this paper at odd times and often unknown to himself, and all have my sincere thanks. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.