Scarab Beetles of the Genus Onthophagus Latreille North of Mexico (Coleoptera: Scarabaeidae).by Henry F. Howden; Oscar L. CartwrightDieke · The Quarterly Review of Biology1964PDF368 KB
Biology and Taxonomy of North American Beetles of the Subfamily Geotrupinae, with Revisions of the Genera Bolbocerosoma, Eucanthus, Geotrupes and Peltotrupes (Scarabaeidae).by Henry F. HowdenDieke · The Quarterly Review of Biology1957PDF415 KB
Biology and Taxonomy of North American Beetles of the Subfamily Geotrupinae, with Revisions of the Genera Bolbocerosoma, Eucanthus, Geotrupes and Peltotrupes (Scarabaeidae). Henry F. HowdenDieke · The Quarterly Review of Biology1957PDF359 KB
