1949. Dipodomys ordii fuscus Setzer, Univ. Kansas Publ., Mus. Nat. Hist., 1:555, December 27, type from Jaumave, Tamaulipas.
1952. Dipodomys ordii durranti Setzer, Jour. Washington Acad. Sci., 42:391, December 17, a renaming of D. o. fuscus Setzer, 1949.
Distribution in Tamaulipas.—Semi-desert areas in western part of state.
The specimen examined from four miles north of Jaumave was trapped in a xeric area in which the vegetation consisted of mesquite, high palmlike yuccas, and "lechugilla." Specimens from the vicinity of Tula were trapped along bushy fence rows and adjacent to clumps of bushes and cactus, or shot at night in an area in which the soil was a sandy loam having relatively large amounts of gravel. The average weight of seven specimens from Nicolás was 50.3 (42-60) grams.
According to Lidicker (1960:178 and in litt.), the place called Lulú that was ascribed to Tamaulipas by Setzer (1949:550), and from which D. o. durranti was reported, actually is in Zacatecas.
Records of occurrence.—Specimens examined, 19: Miquihuana, 6200 ft., 2; 4 mi. N Jaumave, 2500 ft., 3; Nicolás, 56 km. NW Tula, 12; 8 km. N Tula, 4500 ft., 2.
Additional records (Setzer, 1949:556): Nuevo Laredo; Jaumave.
Dipodomys ordii parvabullatus Hall
1951. Dipodomys ordii parvabullatus Hall, Univ. Kansas Publ., Mus. Nat. Hist., 5:38, October 1, type from 88 mi. S and 10 mi. W Matamoros, Tamaulipas.
Distribution in Tamaulipas.—Known only from two islands off the barrier beach.