Produced by Chris Curnow, Joseph Cooper and the Online Distributed Proofreading Team at http://www.pgdp.net [Transcriber's Note: The following typographical errors are noted, but not corrected in the text: page 116: "typotypes" should be "topotypes" page 116: "Potosi" should be "Potosí" page 116: "Sán Miguel" should be "San Miguel" page 116: "Sán Isidro" should be "San Isidro" page 117: "pleateau" should be "plateau" page 120: "Nuevo Leon" should be "Nuevo León"] UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Volume 14, No. 7, pp. 111-120, 1 fig. December 29, 1961 Taxonomic Status of Some Mice of The Peromyscus boylii Group in Eastern Mexico, With Description of a New Subspecies BY TICUL ALVAREZ UNIVERSITY OF KANSAS LAWRENCE 1961 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, Henry S. Fitch, Theodore H. Eaton, Jr. Volume 14, No. 7, pp. 111-120, 1 fig. Published December 29, 1961 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY JEAN M. NEIBARGER, STATE PRINTER TOPEKA, KANSAS 1961 [Illustration] 29-393 Taxonomic Status of Some Mice of The Peromyscus boylii Group in Eastern Mexico, With Description of a New Subspecies BY TICUL ALVAREZ Saussure (1860) described _Peromyscus aztecus_ from southern México. Osgood (1909) by comparison of one of Saussure's specimens with some from Mirador, Veracruz, concluded that _aztecus_ was a subspecies of _P. boylii_. Dalquest (1953) incorrectly reported specimens of _P. boylii_ from San Luis Potosí as _P. b. aztecus_. Merriam (1898) named _Peromyscus levipes_ from Mt. Malinche, Tlaxcala. Thomas (1903) described from Orizaba, Veracruz, _P. beatae_, which Osgood (1909) mistakenly thought was indistinguishable from _P. boylii levipes_. Therefore, Osgood in 1909 in his revision of the genus _Peromyscus_ reported only two subspecies of _P. boylii_ from eastern México: _P. b. levipes_, and _P. b. aztecus_. Study of Osgood's and Thomas' material, along with recently collected specimens from the states of eastern México, leads me to conclude that _P. aztecus_ and _P. boylii_ are different species; that _P. beatae_ is a valid subspecies different from _P. b. levipes_; and finally that specimens of _P. boylii_ from Nuevo León and northwestern Tamaulipas pertain to an hitherto unnamed subspecies. #Peromyscus aztecus# Saussure 1860. _H[esperomys]. aztecus_ Saussure, Revue et Mag. Zool., Paris, ser. 2, 12:105, type from southern México, probably from the vicinity of Mirador, Veracruz, according to Osgood (N. Amer. Fauna, 28:156-157, April 17, 1909). 1909. _Peromyscus boylei aztecus_, Osgood, N. Amer. Fauna, 28:156, April 17. _Geographic distribution._--Known only from Mirador and Jalapa in Veracruz, and Huachinango in Puebla.