Akodon olivaceus (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:16.

TYPE LOCALITY: Chile, Aconcagua Prov., Valparaiso .

DISTRIBUTION: N through midsouthern Chile, bordering area of westernmost Argentina, about to 48°S latitude.

SYNONYMS: atratus, beatus, brachiotis, brevicaudatus, chonoticus, foncki, germaini, landbecki, lepturus, macronychos, mochae, nasica, nemoralis, pencanus, psilurus, renggeri, ruficaudus, senilis, trichotis, vinealis, xanthopus.

COMMENTS: Subgenus Akodon . Yaftez et al. (1979) arranged xanthorhinus and canescens as subspecies of A. olivaceus; Patterson et al. (1984) presented distributional and morphological arguments that sustain their specific distinction. Listing of Phillipi's numerous epithets follows Osgood (1943).