Entomology Research Museum, Entomology Research Museum at University of California, Riverside, United States

The Entomology Research Museum at University of California in Riverside is a scientific collection with millions of preserved insect specimens from around the world. The specimens are stored in different ways: pinned, mounted on slides, or preserved in liquid.

The first specimens came from the California State Insectary in Sacramento, transferred by Harry Smith in 1923. P.H. Timberlake added a large personal collection in 1924 and L.D. Anderson another in 1948; the G.P. McKenzie collection of North American Coleoptera was bought in 1965. E.I. Schlinger formalized the museum division in 1962.

The collection documents insect diversity from different regions and shows how these organisms function in their natural habitats. Visitors can see how scientists classify and study insects to better understand the natural world.

The collection is held in the Department of Entomology at UC Riverside, in the university's inland southern California campus. It is a research collection rather than a public exhibition hall, so access is arranged with the department rather than through general campus visiting hours.

The Chalcidoidea holdings are among the world's largest for this wasp superfamily, and the associated slide collection has no comparison anywhere: more than 100,000 slides, mainly Trichogrammatidae, Aphelinidae, Mymaridae, Eulophidae and Encyrtidae. The museum also holds over 1,100 primary types, most attributable to P.H. Timberlake.