A classic entomology text with many illustrations. Other editions were published in 1930 and 1936. (Glenn W. Herrick was co-author on the third edition.) The first edition (1895) is in the public domain according to the law in the United States, and should be a good source of diagrams for the BugGuide glossary, for example.

Various editions back to the 1890's--link to the 1930 edition at the Biodiversity Heritage Library.