Neotoma micropus littoralis Goldman
1905. Neotoma micropus littoralis Goldman, Proc. Biol. Soc. Washington, 18:31, February 2, type from Altamira, 100 ft., Tamaulipas.
Distribution in Tamaulipas.—From the Sierra de Tamaulipas southward.
Weight of two males and three non-pregnant females was 248, 254, 185, 210, 240 grams, respectively.
Records of occurrence.—Specimens examined, 14: Sierra de Tamaulipas, 2 mi. S, 10 mi. W Piedra, 1200 ft., 6; 6 mi. N, 6 mi. W Altamira, 8.
Additional record: Altamira (Goldman, 1910:29).
Neotoma micropus micropus Baird
1855. Neotoma micropus Baird, Proc. Acad. Nat. Sci. Philadelphia, 7:333, April, type from Charco Escondido, Tamaulipas.
Distribution in Tamaulipas.—From Soto la Marina northward.
The weight of five males and four females from Soto la Marina averaged, respectively, 256.4 (210-317) and 233.0 (195-274) grams.