Trogoderma grassmani Beal (1954) is a moderately abundant species of dermestid beetle that occurs throughout the southwestern United States in old wasp, bee and sheltered bird nests, and frequently as a minor pest in various stored food products. The original description of the species included a series of twenty-three vaguely different specimens that were taken in a granary in Salina, Utah. Close study of their external features failed to reveal the consistent presence of any single character by which these specimens might be distinguished from T. grassmani.