82 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
65. Sigmodon ochrognathus Bailey. 
1902. Sigmodon ochrognathus Bailey, Proc. biol. soc. Wash¬ 
ington, xv, p. 115. June 2, 1902. 
Type locality. — Chisos Mountains, Brewster County, Texas. 
Altitude, 8000 feet. 
66. Sigmodon leucotis Bailey. 
1902. Sigmodon leucotis Bailey, Proc. biol. soc. Washington, 
xv, p. 115. June 2, 1902. 
Type locality. — Valparaiso Mountains, State of Zacatecas, 
Mexico. Altitude, 8700 feet. 
67. Sigmodon alticola Bailey. 
1902. Sigmodon alticola Bailey, Proc. biol. soc. Washing¬ 
ton, xv, p. 116. June 2, 1902. 
Type locality. — Cerro San Felipe, State of Oaxaca, Mexico. 
Altitude, 10,000 feet. 
68. Sigmodon alticola amoles Bailey. 
1902. Sigmodon alticola amoles Bailey, Proc. biol. soc. 
Washington, xv, p. 116. June 2, 1902. 
Type locality. — Pinal de Amoles, State of Queretaro, 
Mexico. Altitude, 7000 feet. 
Genus ORYZOMYS Baird. 
The species of this genus occurring in Mexico and the United 
States have been revised by Merriam (Proc. Washington acad. sci., 
in, p. 273-295, July 26, 1901). 
69. Oryzomys albiventer Merriam. 
1901. Oryzomys albiventer Merriam, Proc. Washington acad. 
sci., hi, p. 279. July 26, 1901. 
Type locality. — Ameca, State of Jalisco, Mexico. 
70. Oryzomys angusticeps Merriam. 
1901. Oryzomys angusticeps Merriam, Proc. Washington 
acad. sci., in, p. 292. July 26, 1901. 
Type locality.— *Volcan Santa Maria, Guatemala. Altitude, 
9000 feet. 
