The research collection comprises over 1,300,000 specimens of insects representing at least 15,000 species. Specimens are pinned, slide mounted, and liquid preserved in alcohol with dried artifacts. The important collection holdings include the George and Alice Beatty Odonata Collection, John Pepper Aphid Collection, K.C. Kim Anoplura. Collection, archival collections from major inventory and assessment projects including several national parks and a PA National Guard Training Center and others.