1921. Revised list of the species in the genus _Dipodomys_. Journal of Mammalogy, vol. 2, No. 2, pp. 94-97, May 2. MCATEE, W. L. 1921. Farm help from the birds. In Yearbook of the U. S. Dept. Agr. for 1920, pp. 253-270; unnumbered figs. in text. MERRIAM, C. H. 1890. Description of three new kangaroo rats, with remarks on the identity of _Dipodomys ordii_ of Woodhouse. In North Amer. Fauna No. 4, Div. Ornith. and Mamm. (Biol. Surv.), U. S. Dept. Agr., 41-49. NELSON, E. W. 1918. Smaller mammals of North America. Nat. Geog. Mag., vol. 33, No. 5, pp. 371-493; numerous unnumbered figs. and colored pls. in text. ADDITIONAL COPIES OF THIS PUBLICATION MAY BE PROCURED FROM THE SUPERINTENDENT OF DOCUMENTS GOVERNMENT PRINTING OFFICE WASHINGTON, D. C. AT 15 CENTS PER COPY