Page, M., L. Nelson, M. Haverty, and G. Blomquist. 1990a. Cuticular hydrocarbons as chemotaxonomic characters for bark beetles: Dendroctonus ponderosae, D. jeffreyi, D. brevicomis, and D. frontalis (Coleoptera: Scolytidae). Annals of the Entomological Society of America 83:892-901.