POCKET MOUSE 



Beautiful Pocket Mouse. — Perognathns callistus Osgood. 

 Smaller than apache. Upperparts grayish olive-buff, 

 sprinkled with black; a distinct lateral line, cream buff; out- 

 side of ears whitish, inside dusky; a prominent creamy buff 

 spot back of ear; tail dusky above, white below; underparts 

 clear white. Total length, 5.4 inches; tail vertebras, 2.5 

 inches; hind foot, .^2 inch. Found in Sweetwater County, 

 Wyoming. 



Longimembris Group 



Tejon Pocket Mouse.- — Perognathus longimembris longimem- 

 bris (Coues). 

 Size small; ears large; tail slightly longer than head and 

 body, sparsely haired and pencilled; pelage soft; posterior 

 third of soles haired. Upperparts yellowish brown finely 

 mixed with dusky; lateral line clear yellowish brown; feet 

 white; yellowish patch back of ear; tail buffy above and 

 below, darker toward tip; underparts white. Total length, 

 4.8 inches; tail vertebras, 2.5 inches; hind foot, .7 inch. 

 Found in the vicinity of old Fort Tejon, Kern County, Cali- 

 fornia; limits of range unknown. 

 Panamint Pocket Mouse. — Perognathus longimembris pan- 

 amintiniis Merriam. 

 Upperparts grayish buff sprinkled with dark-tipped hairs; 

 an indistinct pale buff lateral line ; forelegs buffy to white ; 

 dusky on upperside of tail, especially at tip; underparts 

 white. Total length, 5.7 inches; tail vertebrae, 3.1 inches; 

 hind foot, .78 inch. Found in "Panamint Mountains, 

 California, and eastward through southern Nevada to St. 

 George, Utah." (Osgood) 

 Bangs Pocket Mouse. — Perognathus longimembris bangsi 

 Mearns, 

 Smaller and paler than panamintinus. Upperparts pale 

 vinaceous buff lightly sprinkled with black; lateral line in- 

 distinct; underparts white, including feet and forelegs. 

 Total length, 5.5 inches; tail vertebrae, 3.2 inches; hind 

 foot, .76 inch. Found in "Desert valleys of southern and 

 southeastern California, Lower Sonoran Zone." (Osgood) 

 Perognathus pericalles Elliot = Perognathus longimembris 



bangsi, according to Grinnell. 

 San Felipe Pocket Mouse. — Perognathus longimembris areni- 

 cola (Stephens). 

 Resembling bangsi but paler and whiter. Total length, 5.6 

 inches; tail vertebrae, 3.3 inches; hind foot, .76 inch. Found 

 in San Diego County, California, region about San Felipe 

 Narrows. (Said by Grinnell to be a synonym of bangsi) 

 Short-nosed Pocket Mouse. — Perognathus longimembris brevi- 

 nasus (Osgood). 

 Similar to panamintinus but darker, tail shorter. Upper- 

 parts pinkish buff mixed with black; pelage of back, espe- 



303 



