In preparing a list of kinds of mammals of which specimens have been saved from the Mexican state of Michoacan, two heretofore unrecognized subspecies of the Mexican meadow mouse, _Microtus mexicanus_, have been found. Names for these and descriptions are given below. _Type._--Male, adult, skin and skull; No. 100637, Univ. California Mus. Vert. Zool.; 3-1/2 mi. S Patzcuaro, 7,900 ft., Michoacan, Mexico; March 9, 1943; obtained by E. R. Hall, original no. 5882.…
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