Oryzomys flavescens (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:19.

TYPE LOCALITY: Uruguay, Maldonado .

DISTRIBUTION: S. Brazil; Uruguay; N. and C. Argentina.

COMMENT: Formerly included in genus Oligoryzomys which was considered a subgenus of Oryzomys by Langguth, 1963, Communic. Zool. Mus. Hist. Nat. Montevideo, 7:3, and Massoia, 1973, Rev. Invest. Agro. INTA, ser. 1, 10(l):21 — 37, and by Gardner and Patton, 1976, Occas. Pap. Mus. Zool. La. St. Univ., 49:19, 24, and Myers and Carleton, 1981, Misc. Publ. Mus. Zool. Univ. Mich., 161:1-41, who considered flavescens a distinct species. Hershkovitz, 1966, Z. Saugetierk., 31: 137, considered flavescens a subspecies of nigripes . Cabrera, 1961:380, 389, included flavescens in subgenus Oryzomys (within which he included Oligoryzomys as a synonym).

ISIS NUMBER: 5301410008035026001.