C. borealis Ewing, 1929

Catallagia borealis Ewing, 1929: 126 . Catallagia onaga Jordan, 1929: 172 .

Distribution. Canada and USA.

Hosts. Blarina brevicauda . Other hosts. Rodentia: Clethrionomys gapperi, Clethrionomys sp., Microtus chrotorrhinus, M. p. pennsylvanicus, Napaeozapus insignis, and Peromyscus maniculatus (Jellison & Good, 1942; Hopkins & Rothschild, 1962; Benton & Kelly, 1975; Lewis & Haas, 2001).