_Specimens examined._--Total number, 130.
=Colorado=: _Larimer Co._: Arkins, 1 BS. _Jefferson Co._: W spur Lookout Mountain, near Golden, 1 WC. _Gunnison Co._: Sapinero, 3 BS. _Saguache Co._: 5 mi. N and 22 mi. W Saguache 10,000 ft., 1; 21 mi. W and 3 mi. N Saguache, 1. _Fremont Co._: 18 mi. S and 7 mi. W Colorado Springs, 1; Arkansas River, "about" 26 mi. below Canon City, 15 BS. _San Juan Co._: Silverton, 1 BS. _Mineral Co._: 3 mi. E Creede, 1. _Alamosa Co._: Sangre de Cristo Range, 24 mi. E Hooper, 2 CM. _La Plata Co._: 2 mi. NE Bondad 6,100 ft., 1; Bondad, 15 mi. S Durango 6,050 ft., 1. _Archuleta Co._: Chromo, 1 CM. _Las Animas Co._: Trinidad, 6 BS. _Baca Co._: unspecified, 1.
=New Mexico=: _San Juan Co._: Blanco, 1 BS; Chuska Mountains, 8 BS. _Rio Arriba Co._: 8 mi. N El Rito, 1; 4 mi. N El Rito, 5; Rim Rock, El Rito, 2; 2 mi. E El Rito, 7,000 ft., 1; 2 mi. SE El Rito, 1; 6 mi. E and 1/2 mi. S Truchas, 8,500 ft., 1; 2 mi. S and 4 mi. W Coyote, 8,100 ft., 1; unspecified, 2. _Taos Co._: 3 mi. N Taos Pueblo, 5 BS; 23 mi. S and 6 mi. E Taos, 8,750 ft., 2. _Union Co._: Emery Peak, 1 BS; Folsom, 3 BS; Sierra Grande, 8 BS; unspecified, 2. _McKinley Co._: Bear Ridge, Zuni Mountains, 9 BS. _Sandoval Co._: Bear Canyon, W foothills, Sandia Mountains, 3 BS; W foothills, near S end, Sandia Mountains, 7 BS. _Santa Fe Co._: San Pedro, 7 BS. _San Miguel Co._: Canadian River, 4 mi. NW Tucumcari, 1 BS. _Valencia Co._: Mount Taylor, San Mateo Mountains, 10 BS.
=Oklahoma=: _Cimarron Co._: Kenton, 1 BS.
=Eutamias quadrivittatus hopiensis= Merriam
_Eutamias hopiensis_ Merriam, Proc. Biol. Soc. Washington, 18:165, June 29, 1905.
_Eutamias quadrivittatus hopiensis_, Howell, Jour. Mamm. 3:184, August 4, 1922.
_Type._--Female, adult, skull and skin, No. 67768 U. S. Nat. Mus.; from Keams Canyon, Painted Desert, Arizona; obtained on July 27, 1894, by A. K. Fisher.
_Diagnosis._--Size medium; dorsal dark stripes tawny; crown Drab-Gray; baculum of same proportions as in _E. q. quadrivittatus_ but smaller.
[Illustration: FIG. 2. Localities of specimens examined and probable geographic ranges of the subspecies of _Eutamias quadrivittatus_ and _Eutamias umbrinus_. The symbols for locality records are as follows: circles, precise localities; triangles, localities known only to county.