372 U. S. NATIONAL MUSEUM BULLETIN 205 



1884. Perognathus penicilliatus (sic) True, Proc. U. S. Nat. Mus., vol. 7 (App., 

 Circ. 29) , p. 599, Nov. 29, 1884. 



Type Locality. — San Francisco Mountain, Coconino County, Ariz, (see Hall, 

 Mammals of Nevada, p. 377, July 1, 1946). Range.— Vicinity of Colorado 

 River, from Searchlight, Clark County, southern Nevada (Hall. op. cit., p. 376) , 

 south to Yuma and east at least to Wickenberg in northern Maricopa County, Ariz. 

 (Goldman, Proc. Biol. Soc. Washington, vol. 52, p. 33, Mar. 11, 1933; regarded 

 as pricei by Hatfield, Bull. Chicago Acad. Sci., vol. 6, No. 8, p. 153, Jan. 12, 

 1942) ; in California, eastern portion of Mohave Desert, and south along Colorado 

 River from Needles to near Potholes; zonal range, Lower Sonoran; vertical 

 range, below 500 feet (Grinnell, Univ. California Publ. Zool., vol. 40, No. 2, 

 p. 152, Sept. 26, 1933). 



Perognathus penicillatus sobrinus Goldmanf * 



1939. Perognathus penicillatus seorsus Goldman, Proc. Biol. Soc. Washington, 

 vol. 52, p. 34, Mar. 11, 1939. (Not Perognathus spinatus seorsus Burt, 

 1932.) 

 1939. Perognathus penicillatus sobrinus Goldman, Journ. Mamm., vol. 20, No. 



2, p. 257, May 15, 1939. (Substitute for seorsus Goldman.) 

 Type Locality. — Sand flat along Virgin River, 7 miles above Bunkerville, 

 Clark County, Nev. [Regarded as Mohave County, Ariz., by Hardy, Journ. 

 Mamm., vol. 30, No. 4, p. 435, Nov. 17, 1949.] Range.— Sandy and alluvial 

 soils along Muddy, Virgin, and Colorado Rivers north from Boulder Dam, Nev. 

 (Hall, Mammals of Nevada, p. 376, July 1, 1946) ; and probably extending 

 along Virgin River into extreme northwestern Arizona. 



Perognathus penicillatus Stephens! Merriamf* 



1894. Perognathus (Chaetodipus) stephensi Merriam, Proc. Acad. Nat. Sci. 

 Philadelphia, vol. 46, p. 267, Sept. 27, 1894. 



1913. Perognathus penicillatus stephensi Grinnell, Proc. California Acad. Sci., 

 ser. 4, vol. 3, p. 333, Aug. 28, 1913. 



Type Locality. — Mesquite Valley [edge of a little mesa near Triangle Spring], 

 northwest arm of Death Valley, Inyo County, Calif. Range. — Central and west- 

 ern portions of Mohave Desert, from Death Valley, Inyo County, south to Victor- 

 ville, San Bernardino County, and to near Peck's Butte, northeastern Los Angeles 

 County, Calif.; zonal range, Lower Sonoran; vertical range, from near sea level 

 (type locality) up to 2,700 feet at Victorville (Grinnell, Univ. California Publ. 

 Zool., vol. 40, No. 2, p. 153, Sept. 26, 1933) . 



Perognathus penicillatus angustirostris Osgoodf* 



1900. Perognathus penicillatus angustirostris Osgood, North Amer. Fauna 

 No. 18, p. 47, Sept. 20, 1900. 



Type Locality. — Carrizo Creek, western edge of Colorado Desert, Imperial 

 County, Calif. Range. — Colorado Desert; south to northeastern Baja California 

 and east to Colorado River; in California, west from valley of Colorado River 

 at Fort Yuma and Pilot Knob, Imperial County, to Vallecito and La Puerta 

 Valley, in eastern San Diego County, and north from Mexican border as far as 

 Cabezon, Riverside County; zonal range, Lower Sonoran; vertical range, from 

 below sea level (at several localities around margin of Salton Sea) up as high 



