Akodon budini (Thomas, 1918) . Ann. Mag. Nat. Hist., ser. 9, 1:191.

TYPE LOCALITY: Argentina, Jujuy Prov., Leon, 1500 m .

DISTRIBUTION: Mountains of NW Argentina.

SYNONYMS: deceptor.

COMMENTS: Type species of Hypsimys, which Cabrera (1961) and Reig (1987) recognized as a subgenus of Akodon . Karyotype reported by Vitullo et al. (1986) and biochemical divergence by Apfelbaum and Reig (1989).