H. occidentalis Holland, 1949

Hystrichopsylla occidentalis Holland, 1949: 76 .

Distribution. Canada and USA.

Hosts. Sorex pacificus . Other hosts. Insectivora ( Talpidae): Neurotrichus sp. Rodentia: Microtus oregoni serpens (Holland, 1949; Carraway, 1985; Ayala­Barajas et al., 1988; Hopkins & Rothschild, 1962).