110 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Genus XENOMyS Merriam. 
1892. Xenomys Merriam, Proc. biol. soc. Washington, vii, p. 
160. September 29, 1892. Type.— Xenomys nelsoni Merriam. 
Xenomys nelsoni Merriam. 
1892. Xenomys nelsoni Merriam, Proc. biol. soc. Washing¬ 
ton, VII, p. 161. September 29, 1892. 
Type locality.— Hacienda Magdalena, between the City of 
Colima and Manzanillo, State of Colima, Mexico. 
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Genus NEOTOMODON Men •iam. 
1898. Xeotomodon Merriam, Proc. biol. soc. Washington, xii, 
p. 127. April 30, 1898. Type.— Xeotomodon cdstoni Merriam. 
Neotomodon alstoni Merriam. 
1898. Xeotomodon cdstoni Merriam, Proc. biol. soc. Wash¬ 
ington, XII, }). 128. April 30, 1898. 
Type locality. — Xahuatzin, State of Michoacan, Mexico. 
Altitude, 8500 feet. 
Neotomodon orizabae Merriam. 
1898. Xeotomodon orizahae Merriam, Proc. biol. soc. Wash¬ 
ington, XII, p. 129. April 30, 1898. 
Type locality. — Mount Orizaba, State of Puebla, Mexico. 
Altitude, 9500 feet. 
Neotomodon perotensis Merriam. 
1898. Xeotomc)don perotensisX^iSiB.\\:}>,i^ Proc. biol. soc. Wash¬ 
ington, XII, p. 129. April 30, 1898. 
Type locality. — Cofre de Perote, State of Vera Cruz, Mex¬ 
ico. Altitude, 9500 feet. 
