Weight of four adults averaged 49.2 (44-60) grams.
Records of occurrence.—Specimens examined, 17: 33 mi. S Washington Beach, 4; 88 mi. S, 10 mi. W Matamoros, 7; 90 mi. S, 10 mi. W Matamoros, 6.
Dipodomys ordii compactus True
1889. Dipodomys compactus True, Proc. U. S. Nat. Mus., 11:160, January 5, type from Padre Island, Cameron Co., Texas.
1942. Dipodomys ordii compactus, Davis, Jour. Mamm., 23:332, August 13.
Distribution in Tamaulipas.—Reported only from Bagdad (Hall, 1951:41).
Dipodomys merriami atronasus Merriam
Merriam's Kangaroo Rat
1894. Dipodomys merriami atronasus Merriam, Proc. Biol. Soc. Washington, 9:113, June 21, type from Hacienda La Parada, about 25 mi. NW San Luis Potosí, San Luis Potosí.
Distribution in Tamaulipas.—Mexican Plateau in western part of state.