=========================+=============+=========+=============
LOCALITY | Date | Embryos | Size in mm.
-------------------------+-------------+---------+-------------
4 mi. N La Pesca | May 26 | 4 | 30
Sierra de Tamaulipas | June 10 | 3 | 10
Sierra de Tamaulipas | June 11 | 4 | 10
Sierra de Tamaulipas | June 20 | 2 | 20
Ciudad Victoria | July 12 | 5 | 5
Jaumave | July 28 | 4 | 14
Jaumave | July 29 | 6 | 25
San Fernando | August 30 | 7 | 20
San Fernando | August 31 | 8 | 11
Vicinity of Nuevo Laredo | November 15 | 3 | 5
Vicinity of Nuevo Laredo | November 16 | 5 | 2
-------------------------+-------------+---------+-------------
Baker (1951:216) reported a specimen from 35 kilometers north and 10
kilometers west of Ciudad Victoria (= 1 km. E El Barretal) as _S. h.
toltecus_. Comparison of its skull with those from the vicinity of
Altamira (_S. h. toltecus_) and those from Jaumave (_S. h.
berlandieri_) shows that the skull from El Barretal closely resembles
those from Jaumave, in having the zygomatic arches more nearly
parallel and the braincase more rounded than in skulls from Altamira.
Therefore the specimen from the vicinity of El Barretal is here
assigned to _S. h. berlandieri_.
_Records of occurrence._--Specimens examined, 64: 4-1/2 mi.
S Nuevo Laredo, 600 ft., 1; 10 mi. S, 11 mi. E Nuevo Laredo,
8; San Fernando, 180 ft., 8; 4 mi. N La Pesca, 10; 3 mi. N
La Pesca, 1; 1 mi. E La Pesca, 3; Soto la Marina, 500 ft.,
1; 36 km. N, 10 km. W Cd. Victoria, 1 km. E El Barretal, Rio
Purificacion, 1; Cd. Victoria, 1; 2 km. W Pan-American
Highway (12 km. S Llera), Ejido Santa Isabel, 2000 ft., 1;
Jaumave, 2400 ft., 29.
Additional records: Matamoros (Baird, 1858:506); Sierra San
Carlos (El Mulato, Tamaulipeca, San Miguel) (Dice,
1937:254); Mesa de Llera (Hooper, 1953:9); Tamaulipas
[state?] (Baird, 1858:506).
=Sigmodon hispidus solus= Hall
1951. _Sigmodon hispidus solus_ Hall, Univ. Kansas Publ.,
Mus. Nat. Hist., 5:42, October 1, type from island 88 mi. S,
10 mi. W Matamoros, Tamaulipas.
_Distribution in Tamaulipas._--Known only from two specimens
from the type locality.
=Sigmodon hispidus toltecus= (Saussure)
1860. [_Hesperomys_] _toltecus_ Saussure, Revue et Mag.
Zool., Paris, ser. 2, 12:98, type from mountains of Veracruz
[probably near Mirador, Dalquest, Louisiana State Univ.
Studies, Biol. Sci. Series, 1:163, December 28, 1953].
1902. _Sigmodon hispidus toltecus_, V. Bailey, Proc. Biol.
Soc. Washington, 15:110, June 2.
_Distribution in Tamaulipas._--Tropical region in southern
part of state. The specimen reported by Baker (1951:216)
from one mile east of El Barretal is here referred to _S. h.
berlandieri_.
_Records of occurrence._--Specimens examined, 69: Sierra de
Tamaulipas, 10 mi. W, 2 mi. S Piedra, 1200 ft., 24; Sierra
de Tamaulipas, 11 mi. W, 8 mi. S Piedra, 2000 ft., 1; Rancho
Pano Ayuctle, 25 mi. N El Mante, 3 km. W highway, 300 ft.,
3; Rancho Pano Ayuctle, 6 mi. N Gomez Farias, 300 ft., 3; 8
km. W, 10 km. N El Encino, 400 ft., 2; 2 km. W El Carrizo,
2100 ft., 20; 6 mi. N, 6 mi. W Altamira, 8; 6 mi. N, 4 mi. W
Altamira, 1; 5 mi. N, 5 mi. W Altamira, 3; 1 mi. S Altamira,
1; 16 km. N Tampico, 3.
Additional records: Rancho del Cielo, 15 to 20 mi. S Mesa de
Llera (Hooper, 1953:9); Cd. Mante (Ingles, 1959:398);
Tampico (Booth, 1957:15).
=Neotoma albigula subsolana= Alvarez