O. leucopus (Baker, 1904)

Ceratophyllus leucopus Baker, 1904: 401 . Ceratophyllus aeger Rothschild, 1905: 167 . Orchopeas leucopus; Jordan, 1933a: 72.

Distribution. Canada, USA, and Mexico.

Hosts. Blarina brevicauda and Sorex cinereus . Other hosts. Carnivora: Spilogale putorius . Rodentia: Clethrionomys gapperi, Glaucomys sabrinus, G. s. macrotis, G. volans, Microtus c. chrotorrhinus, M. ochrogaster, M. p. pennsylvanicus, Microtus sp., Mus musculus, Neotoma sp., Onychomys sp., Peromyscus leucopus, P. maniculatus, P. mexicanus, Peromyscus sp., Reithrodontomys sp., Sigmodon hispidus, S. ochrognathus, Tamias minimus, T. striatus, and Zapus hudsonius (Jellison et al., 1943; Holland, 1949; Rapp Jr. & Gates, 1957; Benton et al., 1969; Benton, 1980; Traub et al., 1983; Morales & Llorente, 1986; Ayala­Barajas et al., 1988; Salceda­Sánchez & Hastriter, 2006).