Ceratophyllus asio Baker, 1904: 388.
Megabothris asio; I. Fox, 1939: 47.
Trichopsylla (Trichopsylla) asio asio; Baker, 1946: 47.
Distribution. Canada and USA.
Hosts. Blarina brevicauda and Sorex cinereus. Other hosts. Carnivora: Mustela erminea and Vulpes vulpes. Lagomorpha: Sylvilagus floridanus. Rodentia: Clethrionomys gapperi, Microtus chrotorrhinus, M. pennsylvanicus, Synaptomys cooperi, Peromyscus maniculatus, and Zapus hudsonius (Benton & Kelly, 1975; Traub et al., 1983; Eckerlin & Painter, 2000; Whitaker, 2004).