Arborimus longicaudus (True, 1890) . Proc. U. S. Natl. Mus., 13:303.

TYPE LOCALITY: USA, Oregon, Coos Co., Marshfield .

DISTRIBUTION: Pacific coast of W Oregon, north of Klamath Mtns, USA.

SYNONYMS: silvicola.

COMMENTS: Although Howell (1926b) recognized silvicola as a nominal species, subsequent research has favored its synonymy under A. longicaudus (Johnson, 1968), where it has been maintained as a subspecies (Hall, 1981; Johnson and George, 1991). Formerly included populations in California assigned to the new species A. porno (see next account).