There are well over 1,000,000 beetles in the collection, housed in over 2500 Cornell drawers. The Cornell beetle collection is one of the major collections representing eastern North America. Other areas especially well represented include Central and South America, tropical Africa, Europe, and Hawaii. There are about 300 primary types represented, with 1225 species represented by primary or secondary types . The greatest taxonomic strengths are Carabidae (450 drawers), Staphylinidae (230 dr.), Scarabaeoidea (over 300 dr.), Tenebrionidae (180 dr.), Cerambycidae (180 dr.), Chrysomelidae (160 dr.), and Curculionidae s.l. (225 dr.). Taxa in the CUIC representing the Scarabaeoidea, Tenebrionidae and the Curculionidae excepting Scolytinae are listed in the downloadable databases. These datafiles were developed by Dr. Chris Marshall, Mr. Kojun Kanda, and Ms. Sadie Solomon, respectively.
Henry Dietrich added large numbers of North American beetles, especially from Mississippi, the Appalachians, and California. More recent collection development has centered on the southern Appalachians, Mexico, New Zealand and Hawaii (Liebherr), and adventive insects new to North America (Hoebeke).
We were fortunate to acquire the collection of E.A. Klages, an exceptional private collection very rich in Neotropical beetles. Our Klages collection consists of approximately 50,000 beetles of which 40,000 are fully prepared (mounted, labeled). Among these are 2500‑3000 species from North America and 2000 species from Venezuela collected in the 1890’s. The collections of Cicindelidae and Scarabaeidae from Venezuela are noteworthy and include type material. The E. W. Mank collection was received by the University in 1945. This collection has special representation of Melandryidae. It includes about 17,000 North American specimens (representing about 5500 species) and 4000 "exotic" specimens (representing about 3800 species). Beyond the determined parts of the collection are about 4000 unidentified Nearctic Coleoptera. The Mank Collection includes types of Melandryidae and is also strong in Chrysomelidae.