Illustrations of the Zygaenidae & Bombycidae of North America This book, "Illustrations of the Zygænidæ & Bombycidæ of North America", by Richard Harper Stretch, is a replication of a book originally published before 1873. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.