Remarks.—Localities where samples were collected are typical "caatinga" forest, a climax of mainly deciduous trees; cacti are also common in the region.
Specimens examined.—Total number, 10, from Brazil, Bahia, as follows: Ituiutaba, Lamarão, 4 (1 DZ, 1 CMNH, 1 MCZ, 1 USNM); Bonfim, Bonfim, 6 (5 DZ, 1 MN).
[INCERTA SEDIS]
Proechimys myosuros ([Lichtenstein])
Loncheres myosuros [Lichtenstein], 1818, Das zoologische Museum der Universität zu Berlin, (2):18 (nomen nudum); [Lichtenstein], 1820, Abhandl. K. Akad. Wissensch., Berlin (1818-1819):192, pl. 1, fig. 2 (orig. descr.); [Wied], 1826, Beiträge zur Naturgeschichte von Brasilien, 2:445.
Mus leptosoma Brants, 1827, Het geslacht der Muizen door Linnaeus opgesteld ..., Berlyn, p. 150; [Lichtenstein], 1830, Darstellung neuer oder wenig bekannter Säugethiere, Berlin, Heft 7, pl. 36, fig. and text pages.
Mus cinnamoneus [Lichtenstein], 1830, Darstellung neuer oder wenig bekannter Säugethiere, Berlin, Heft 7, pl. 36.
Echimys myosuros Is. [Geoffroy] Saint-Hilaire, 1838, Comptes Rendus Acad. Sci., 6(26):886, and 1840, Mag. Zool., Paris (ser. 2, année 2):15, 33, 53; [Allen], 1899, Bull. Amer. Mus. Nat. Hist., 12(20):261.