The Psylloidea collection is located in Building 005, BARC-West, Beltsville, MD. It one of the world's largest collections of psyllid specimens and includes nearly 1500 species represented by over 46,000 pinned specimens, 5,000 microscope slides, three drawers of psyllids on their hosts, 226 holotypes and 27 lectotypes. Specimens that are mounted on microscope slides are stored in room 003 and pinned specimens and dry material are kept in room 001. The associated literature collection is extensive. The collection is curated by Douglass R. Miller.

The collection has grown throughout the years by way of the efforts, contributions, and collections of psyllid workers such as J. S. Caldwell, D. L. Crawford, D. Jensen, T. Pergande, C. V. Riley, L. M. Russell, E. A. Swartz, and L. D. Tuthill.

A searchable inventory database of the specimens in the collection is acessible from the Psylloidea site.