80 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Genus SIG-MODON Say and Ord. 
This seen us lias been revised by Bailey (Proc. biol. soc. Wash- 
ington, xv, p. 101-116, June 2, 1902). The species are arranged 
as follows: 
Sigmodon hispidus Say and Ord. 
Sigmodon hispidus littoralis Chapman. 
Sigmodon hispidus spadicipygus (Bangs.) 
Sigmodon hispidus texianus (Audubon and Bachman). 
Sigmodon hispidus berlandieri (Baird). 
1855. Sigmodon berlandieri Baikd, Proc. acad. nat. sci. 
Philadelphia, vn, p. 333. 
1897. Sigmodon hispidus pallidas Mearns, Preliminary 
diagnoses of new mammals of the genera Sciurus, Castor, 
Neotoma and Sigmodon, from the Mexican border of the 
United States, p. 4. March 5, 1897. (Reprint: Proc. U. 
S. nat. mus., xx, p. 504. January 19, 1898.) 
1902. Sigmodon hispidus berlandieri Bailey, Proc. biol. soc. 
Washington, xv, p. 106. June 2, 1902. 
Type locality.— Rio Nazas, State of Coalmila, Mexico. 
Sigmodon hispidus eremicus Mearns. 
Sigmodon hispidus arizonae Mearns. 
Sigmodon hispidus mascotensis (Allen). 
1897. Sigmodon mascotensis Allen, Bull. Amer. mus. nat. 
hist., ix, p. 54. March 15,1897. 
1897. Sigmodon colimae Allen, Bull. Amer. mus. nat. hist., 
ix, p. 55. March 15, 1897. 
1902. Sigmodon hispidus mascotensis Bailey, Proc. biol. soc. 
Washington, xv, p. 108. June 2, 1902. 
58. Sigmodon hispidus tonalensis Bailey. 
1902. Sigmodon hispidus tonalensis Bailey, Proc. biol. soc. 
Washington, xr, p. 109. June 2, 1902. 
Type locality. — Tonala, State of Chiapas, Mexico. 
