A female obtained on March 2, at Rancho Pano Ayuctle, had 4 embryos 16 mm. in crown-rump length.
Oryzomys fulvescens fulvescens (Saussure)
1860. H[esperomys]. fulvescens Saussure, Revue et Mag. Zool., Paris, ser. 2, 12:102, March, type from Veracruz; fixed by Merriam (Proc. Washington Acad. Sci., 3:295, July 26, 1901) at Orizaba.
1897. Oryzomys fulvescens, J. A. Allen and Chapman, Bull. Amer. Mus. Nat. Hist., 9:204, June 16.
Distribution in Tamaulipas.—Reported only from Rancho del Cielo (Goodwin, 1954:10).
Oryzomys fulvescens engracie Osgood
1945. Oryzomys fulvescens engracie Osgood, Jour. Mamm., 26:300, November 14, type from Hacienda Santa Engracia (32 km. N), NW of Cd. Victoria, Tamaulipas.
Distribution in Tamaulipas.—Central and southeast parts of state.
Records of occurrence.—Specimens examined, 13: 2 km. W El Carrizo, 5; Rancho Pano Ayuctle, 25 mi. N, 3 km. W El Mante, 6; 10 km. N, 8 km. W El Encino, 1; 7 km. N Tampico, 1.
Additional record: Altamira (Osgood, 1945:300).