Midland Nat., 55:257-288, 7 figs., 1 table, April.

HOOPER, E. T.

1947. Notes on Mexican mammals. Jour. Mamm., 28:40-57, February 15.

1949. Faunal relationships of recent North American rodents. Miscl.

Publ. Mus. Zool., Univ. Michigan, 72:1-28, 5 tables, May 20.

1952a. Notes on the pygmy mouse (_Baiomys_), with description of a new subspecies from Mexico. Jour. Mamm., 33:90-97, 3 figs., February 18.

1952b. A systematic review of the harvest mice (genus _Reithrodontomys_) of Latin America. Miscl. Publ. Mus. Zool., Univ. Michigan, 77:1-255, 9 pls., 24 figs., 12 maps, 7 tables, January 16.

1953. Notes on the mammals of Tamaulipas, Mexico. Occas. Papers Mus. Zool., Univ. Michigan, 544:1-12, March 25.

1955a. Extra teeth in the pygmy mouse, _Baiomys musculus_. Jour. Mamm., 36:298-299, May 26.

1955b. Notes on Mammals of western Mexico. Occas. Papers Mus. Zool., Univ. Michigan, 565:1-26, November 9.

1957. Dental patterns in mice of the Genus _Peromyscus_. Miscl. Publ.

Mus. Zool., Univ. Michigan, 99:1-59, 24 figs., 3 tables, March 28.

1958. The male phallus in mice of the genus _Peromyscus_. Miscl. Publ.

Mus. Zool., Univ. Michigan, 105:1-24, 1 fig., 24 pls., 1 table, December 29.

HUNSAKER, D., RAUN, G. G., and SWINDELLS, J. E.

1959. Range expansion of _Baiomys taylori_ in Texas. Jour. Mamm., 40:477-478, August 20.

KOOPMAN, K. F.

1950. Natural selection for reproductive isolation between _Drosophila pseudoobscura_ and _Drosophila persimilis_. Evolution, 4:135-148, 3 figs., 7 tables, June.

LACK, D.

1944. Ecological aspects of species formation in pa.s.serine birds. Ibis, 86:260-286, July.

LAYNE, JAMES N.

1959. Growth and development of the eastern harvest mouse, _Reithrodontomys humulis_. Bull. Florida State Mus., 4:61-82, 5 figs., April 27.

LEOPOLD, A. S.

1950. Vegetation zones of Mexico. Ecol., 31:507-518, 1 fig., 1 table, October.

LOWERY, G. H., and DALQUEST, W. W.

1951. Birds from the state of Veracruz, Mexico. Univ. Kansas Publ., Mus. Nat. Hist., 3:531-649, 7 figs., 2 tables, October 10.

LUKENS, P. W., JR.

1955. The mammals of the Chilpancingo area of the Mexican state of Guerrero. Unpublished Master's dissertation, Texas Agricultural and Mechanical College of Texas. 209 pp.

MAYR, E.

1949. Speciation and selection. Proc. Amer. Phil. Soc., 93:514-519, December.

MEARNS, E. A.

1907. Mammals of the Mexican boundary of the United States ... Pt.

1, Families Didelphidae to Muridae. Bull. U. S. Nat. Mus., 56:xv + 530, 13 pls., 126 figs., numerous tables, April 13.

MERRIAM, C. HART

1892. Descriptions of new mammals collected by E. W. Nelson in the states of Colima and Jalisco, Mexico. Proc. Biol. Soc. Washington, 7:164-174, September 29.

MOORE, R. T.

1945. The transverse volcanic biotic province of central Mexico and its relationship to adjacent provinces. Trans. San Diego Soc. Nat.

Hist., 10:217-236, 1 map, 4 tables, August 31.

OSGOOD, W. H.

1909. Revision of the mice of the American Genus _Peromyscus_. N. Amer.

Fauna, 28:1-285, 8 pls., 12 figs., several tables, April 17.

PACKARD, R. L.

1958a. New subspecies of the rodent _Baiomys_ from Central America.

Univ. Kansas Publ., Mus. Nat. Hist., 9:397-404, 2 tables, December 19.

1958b. The taxonomic status of _Peromyscus allex_ Osgood. Proc. Biol.

Soc. Washington, 71:17-20, April 11.

RIDGWAY, R.