THOMOMYS. 335 



d'cnl. Char. Size medium; tail half as long as body and head; 

 claws large, long. 



Color. Above reddish brown, darkest on dorsal region; sides 

 and under parts yellowish white, tinged with rufous on abdomen; 

 lips and ears dusky; inside of pouches whitish; tail with basal part 

 like back. 



Measurements. Total length, 239; tail vertebrae, 79; hind foot, 

 29; ear, 8. Skull: basal length, 37; Hensel, 35; zygomatic width, 

 25; interorbital breadth, 7; length of upper molar series, 8; length 

 of mandible, 25. 



(Thomomys}, Allen, Bull. Amer. Mus. Nat. Hist., 1898, 

 p. 146. 

 SANTA ANITA POCKET GOPHER. 



Type locality. Santa Anita, Lower California, Mexico. 



Geogr. Distr. Cape Region, Lower California, Mexico. 



Genl. Char. Similar to T. fnlvns; nasals gradually broaden postero- 

 anteriorly. 



Color. Above yellowish brown, darkest on median line; under 

 parts buff; about mouth, cheek pouches and ears blackish. 



Measurements. Total length, 250; tail vertebras, 62; hind foot, 

 35; ear, 8.5. Skull: total length, 42; basal length, 38.7; zygomatic 

 width, 26.5; mastoid width, 21; interorbital constriction, 8; length 

 of nasals, 14.6; width of nasals posteriorly, 2.5. 



b. alticola (Thomomys}, Allen, Bull. Am. Mus. Nat. Hist., 1899, 



P- i3- 

 SIERRA LACUNA POCKET GOPHER. 



Type locality. Sierra Laguna, Lower California, Mexico. Altitude, 

 7,000 feet. 



Geogr. Distr. High altitudes in the Sierra Laguna, Lower Cali- 

 fornia, Mexico. 



(icnl. Char. Similar to T. /. anita, but darker. Skull similar 

 in size and characters. 



Color. Above yellowish brown and black, darkest on dorsal 

 region; nose and edges of cheek pouches blackish; spot at base of 

 ear dusky; under parts reddish fulvous; inside of cheek pouches and 

 anal region white; tail and feet whitish. 



Measurements. Total length, 225; tail, 61; hind foot, 30. 



c. ni firictins (Thomomys}, Rhoads, Proc. Acad. Nat. Scien. Phil., 



1895, p. 36. 

 BLACKISH POCKET GOPHER. 



Type locality. Witch Creek, San Diego County, California. 



