This species has a restricted geographic distribution in Tamaulipas,
although three subspecies occur in the state; two of them occur in the
extreme northeast and the other in the far west.
=Dipodomys ordii durranti= Setzer
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 Nicolas was 50.3 (42-60) grams.
According to Lidicker (1960:178 and in _litt._), the place called Lulu
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;
Nicolas, 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.
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