a family of mammals of the order Rodentia. The body length is 5–36 cm, and the tail length is 0.7–33 cm. There are five subfamilies: Cricetinae, Microtinae, Gerbillinae, Neso-myinae, and Lophiomyinae. More than 600 species make up the family’s approximately 100 genera. The rodents are distributed in North and South America, Europe, and Asia, as well as on the island of Madagascar. Seventy-five species, belonging to the subfamilies Cricetinae, Microtinae, and Gerbillinae, are found throughout the USSR. The rodents include terrestrial, subterranean, arboreal, and semiaquatic forms. They are herbivorous or omnivorous. Some species damage agriculture and are carriers of infectious diseases. The pelts of a number of species are used as relatively inexpensive furs.