Insects of Western North AmericaBy Edward Oliver Essig. 1926.
The MacMillan Company, 1926
Subtitle: "A manual and textbook for students in colleges and universities and a handbook for county, state and federal entomologists and agriculturalists as well as for foresters, farmers, gardeners, travelers, and lovers of nature."
A thorough compendium of the biology, ecology, economy and distribution of insects in western North America, west of the continental divide.
Essig, E.O. 1926. Insects of Western North America. The Macmillan Company, New York. 766 b/w figs or photos, xi + 1035 pp.