1887. _Hesperomys (Vesperimus) taylori_ Thomas, Ann. Mag.
Nat. Hist., ser. 5, 19:66, January, type from San Diego,
Duval Co., Texas.
1907. _Baiomys taylori_ Mearns, U. S. Nat. Mus., Bull.
56:381, April 13.
_Distribution in Tamaulipas._--All of state, except
southwestern desert part.
The species of this genus have been revised recently by Packard (1960)
and the specimens from Tamaulipas are arranged according to his
systematic findings. The weight of 35 specimens labeled with reference
to Altamira are 7.6 (6.0-9.0) grams; 15 from Jaumave weigh 6.9
(6.0-9.0) grams. Pregnant females were collected as follows: February
22, Ejido Santa Isabel, 3 (embryos x 4 mm. in crown-rump length); March
2, Rancho Pano Ayuctle, 6 x 16; July 9, six miles north and six miles
west of Altamira, 1 x 4; July 28 and 29, Jaumave, 2 x 8 and 3 x 9. The
average number of embryos was 2.8 (1-5).
_Records of occurrence._--Specimens examined, 83: 4 mi. N La
Pesca, 1; Cd. Victoria, 3; Jaumave, 2400 ft., 17; Ejido
Santa Isabel, 2 km. W Pan-American Highway, 2000 ft., 7;
Rancho Pano Ayuctle, 25 mi. N, 3 km. W El Mante, 300 ft., 4;
Rancho Pano Ayuctle, 6 mi. N Gomez Farias, 300 ft., 1; Rio
Sabinas, 8 km. N El Encino, 400 ft., 1; 2 km. W El Carrizo,
2; 6 mi. N, 6 mi. W Altamira, 33; 5 mi. N, 5 mi. W Altamira,
4; 1 mi. S Altamira, 3; 16 km. N Tampico, 4; 10 mi. NW
Tampico, 1; 7 mi. S Altamira, 1; 1 km. N Tampico, 1.
Additional records (Packard, 1960:654): Camargo; Charco
Escondido, 20 mi. S Reynosa; Matamoras (= Matamoros);
Hidalgo; 29 mi. N Cd. Victoria; Antiguo Morelos.
=Onychomys leucogaster longipes= Merriam