1953. Notes on mammals of Tamaulipas, Mexico. Occas. Papers Mus. Zool., Univ. Michigan, 544:1-12, March 25. HOOPER, E. T., and HANDLEY, C. O., JR. 1948. Character gradients in the spiny pocket mouse, _Liomys irroratus_. _Ibid._, 514:1-34, 1 map, October 29. HOWELL, A. H. 1901. Revision of the skunks of the genus Chincha. N. Amer. Fauna, 20:1-62, 8 pls., August 31. 1938. Revision of the North American ground squirrels, with a classification of the North American Sciuridae. N. Amer. Fauna, 56:1-256, 20 figs., 32 pls., May 18. JACKSON, H. H. T. 1914. New moles of the genus Scalopus. Proc. Biol. Soc. Washington, 27:19-21, February 2. 1928. A taxonomic review of the American long-tailed shrews (Genus Sorex and Microsorex). N. Amer. Fauna, 51:vi + 238, 24 figs., 13 pls., July 24. 1951. Classification of the races of the coyote, pt. 2, pp. 227-341, pls. 58-81, figs. 20-28, _in_ Young, S. P., and Jackson, H. H. T., The clever coyote. Stackpole Co., Harrisburg, Pa., and Wildlife Manag. Inst., Washington, D. C., xv + 411 pp., 81 pls., 28 figs., 11 tables, November 29. JONES, J. K., JR., and ALVAREZ, T. 1962. Taxonomic status of the free-tailed bat, Tadarida yucatanica Miller. Univ. Kansas Publ., Mus. Nat. Hist, 14:125-133, 1 fig., March 7. JONES, J. K., JR., and ANDERSON, S. 1958. Noteworthy records of harvest mice in México. Jour. Mamm., 39:446-447, August 20. KELLOGG, R., and GOLDMAN, E. A. 1944. Review of the spider monkeys. Proc. U. S. Nat. Mus., 96:1-45, November 2. KELSON, K. R. 1952. The subspecies of the Mexican red-bellied squirrel, Sciurus aureogaster. Univ. Kansas Publ., Mus. Nat. Hist., 5:243-250, April 10. LAWRENCE, B. 1947. A new race of Oryzomys from Tamaulipas. Proc. New England Zool. Club, 24:101-103, May 29. LEOPOLD, A. S. 1947. Status of Mexican Big-game herds. Trans. 12th N. Amer. Wild. Conference, pp. 437-448. 1950. Vegetation zones of Mexico. Ecology, 31:507-518, 1 fig., October. 1959. Wildlife of Mexico. The Game birds and mammals. Univ. California Press, pp. xiii + 568, 193 figs. LIDICKER, W. Z., JR. 1960. An analysis of intraspecific variation in the kangaroo rat Dipodomys merriami. Univ. California Publ. Zool., 67:125-218, 20 figs., 4 pls., August 4. LUKENS, P. W., JR., and DAVIS, W. B. 1957. Bats of the Mexican state of Guerrero. Jour. Mamm., 38:1-14, February 25. MALAGA A., A., and VILLA R., B. 1957. Algunas notas acerca de la distribución de los murciélagos de America del Norte relacionados con el problema de la rabia. Anal. Inst. Biol., México, 27:529-568, 8 figs., 10 maps, September 30. MARTIN, M., and P. S. 1954. Notes on the capture of tropical bats at cuevo [sic] El Pachon, Tamaulipas, Mexico. Jour. Mamm., 35:584-585, November. MARTIN, P. S.