RODENTIA: HETEROMYIDAE 391 



1894. Dipodomys merriomi nevadensis Merriamf, Proc. Biol. Soc. Washing- 

 ton, vol. 9, p. Ill, June 21, 1894. (Pyramid Lake, Washoe County, Nev. 

 Regarded as identical with merriami by Hall, Mammals of Nevada, p. 424, 

 July 1, 1946.) 

 1894. Dipodomys merriami nitratus Merriamf, Proc. Biol. Soc. Washington, 

 vol. 9, p. 112, June 21, 1894. (Keeler, east side of Owens Lake, Inyo 

 County, Calif. Regarded as identical with merriami by Grinnell, Journ. 

 Mamm, vol. 2, No. 2, p. 97, May 2, 1921.) 

 1904. Dipodomys merriami mortivallis Elliot, Field Columb. Mus. Publ. 87, 

 Zool. Ser., vol. 3, No. 14 (December 1903) , p. 250, Jan. 7, 1904. (Furnace 

 Creek, Death Valley, Inyo County, Calif. Regarded as identical with 

 merriami by Grinnell, Journ. Mamm., vol. 2, No. 2, p. 97, May 2, 1921.) 

 1907. Dipodomys merriami kernensis Merriamf, Proc. Biol. Soc. Washington, 

 vol. 20, p. 77, July 22, 1907. (Onyx, west end of Walker Pass, Kern County, 

 Calif. Regarded as identical with merriami by Grinnell, Journ. Mamm., 

 vol. 2, No. 2, p. 97, May 2, 1921.) 

 1929. Dipodomys merriami olivaceus Swarth, Proc. California Acad. Sci., 

 ser. 4, vol. 18, No. 12, p. 356, Apr. 26, 1929. (Fairbank, Cochise County, 

 Ariz. Regarded as identical with merriami by Benson, Proc. Biol. Soc. 

 Washington, vol. 47, p. 183, Oct. 2, 1934.) 

 Type Locality. — New River, north of Phoenix, Maricopa County, Ariz. 

 Range. — From Valverde and Ward Counties through extremely arid Lower 

 Sonoran Zone of western Texas (V. Bailey, North Amer. Fauna No. 25, p. 149, 

 Oct. 24, 1905) into southern New Mexico at least as far as Carlsbad in Pecos 

 Valley, to Jarilla and Tularosa in Otero County, to Socorro in Rio Grande 

 Valley, and to Deming and Red Rock in the southwest (V. Bailey, North Amer. 

 Fauna No. 53 (December 1931), p. 263, Mar. 1, 1932) ; south over tableland of 

 Mexico east of Sierra Nevada through northern and eastern Chihuahua to south- 

 ern Coahuila and central Nuevo Leon, Mexico (Vorhies and Taylor, U. S. Dept. 

 Agric. Dept. Bull. 1091, map, p. 4, Sept. 13, 1922) ; most of desert area of north- 

 ern Sonora, Mexico, except northwestern arm, south to San Jose de Guaymas 

 (Burt, Univ. Michigan Mus. Zool. Misc. Publ. 39, p. 47, Feb. 15, 1938) ; Arizona 

 south of Colorado River in area south and west of Mogollon Plateau (Benson, 

 op. cit., p. 182) , Washington County, west of Beaver Dam Mountains, in extreme 

 southwestern Utah (Durrant and Setzer, Bull. Univ. Utah, vol. 35, No. 26, p. 31, 

 June 30, 1945) ; Lower Sonoran zone of southern Nevada north to Alamo, Lincoln 

 County, and low western part of State in salt-desert area north to Quinn River 

 Crossing, Humboldt County (Hall, loc. cit.) ; and Mohave Desert region of 

 California from Nevada line and Colorado River west to Weldon, in valley of 

 South Fork of Kern River, Kern County, and to 7 miles west of Mohave; north, 

 in Owens Valley, to Independence, Inyo County; south to road towards Blythe, 

 53 miles east to Mecca, and, along Colorado River, to Blythe, in Riverside County; 

 vertical range, 200 to 7,000 feet; zonal range, Lower Sonoran (Grinnell, Univ. 

 California Publ. Zool., vol. 40, No. 2, p. 160, Sept. 26, 1933) . 



Dipodomys merriami ambiguus Merriamf* 



1890. Dipodomys ambiguus Merriam, North Amer. Fauna No. 4, p. 42, Oct. 8, 

 1890. (Regarded as "merely an ecotype of [merriami] developed in re- 

 sponse to edaphic conditions" by Davis, Journ. Mamm., vol. 22, No. 2, p. 194, 



