Part 7

HOWELL, A. H. 1929. Revision of the American chipmunks (genera Tamias and Eutamias). U. S. Dept. Agric., Bur. Biol. Surv., N. Amer. Fauna, 52:1-157, 10 pls., 9 figs., November 30.

HUNT, C. B., and SOKOLOFF, V. P. 1950. Pre-Wisconsin soil in the Rocky Mountain region, a progress report. U. S. Geol. Survey, Prof. Paper, 221-G:109-123.

JOHNSON, D. H. 1943. Systematic review of the chipmunks (genus Eutamias) of California. Univ. California Publ. Zool., 48:63-148, 6 pls., December 24.

KELSON, K. R. 1951. Speciation in rodents of the Colorado River drainage. Univ. Utah Biol. Ser., 11(3): vii + 125, 10 figs., February 15.

MERRIAM, C. H. 1905. Two new chipmunks from Colorado and Arizona. Proc. Biol. Soc. Washington, 18:163-166, June 29.

Transmitted June 26, 1953.

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