32 



CITELLUS. 



Genl. Char. Smallest of the C. mollis group; bullae and teeth 

 smaller, similar to C. mollis. 



Color. Nose brown; head lightly grizzled; upperparts mottled, 

 with hind neck and shoulders paler than lower dorsal region; outer 

 side of arms whitish; thighs reddish; flanks and underparts white, 

 black bases of hairs showing through ; tail, above like back, with sub- 

 terminal black band and white tip; beneath buff; hands and feet 

 white. Ex type in United States National Museum. 



Measurements. Total length, 219; tail, 45.5; hind foot, 26.4; 

 (skin). Skull: Occipito-nasal length, 35.3; Hensel, 28.2; zygomatic 

 width, 23; intertemporal width, 9.8; length of nasals, 10.5; length of 

 upper molar series, 7.3; length of mandible, 20.4; length of lower 

 molar series, 6.5. Ex type in United States National Museum. 



Citellus mollis pessimus Merriam. 



Citellus mollis pessimus Merr., Proc. Biol. Soc. Wash., XXVI, 1913, 

 p. 138. 



Type locality. Lower part of Big Lost River, east central Idaho. 



Genl. Char. Similar to C. m. artemisice, but larger and darker; 

 rostrum larger; tooth row longer. 



Color. Similar to C. m. artemisice but generally darker on upper 

 parts; underparts also the same in color except the present race has a 

 slight buffy suffusion at base of tail; tail above black speckled with 

 buff on basal half, edged and tipped with white; beneath ochraceous- 

 buff, with marginal black band edged with white; feet and hands 

 whitish. Ex type in United States National Museum. 



Measurements. Total length, 246; tail to end of hairs, 60.8; hind 

 foot, 24.4 (Skin); Skull: Occipito-nasal length, 36.7; Hensel, 29.8; 

 zygomatic width, 23.5; intertemporal width, 9.5; length of nasals, 

 12.9; length of upper molar series, 8.2; length of mandible, 21.9; 

 length of lower molar series, 7.5; Ex type in United States National 

 Museum. 



Citellus mollis washoensis Merriam. 



Citellus mollis washoensis Merr., Proc. Biol. Soc. Wash., XXVI, 

 1913, p. 138. 



Type locality. Carson Valley, western Nevada. 



Genl. Char. Size larger; pelage grizzled gray like C. canus. 



Color. Similar to C. m. pessimus, but with less ochraceous-buff 

 on the upperparts which is gray and white spotted; underparts buffy; 

 tail very short, ochraceous-buff above, paler beneath; hands tinged 

 with buff, feet whitish. Ex type in United States National Museum. 



Measurements. Total length, 258; tail, 50; hind foot, 35. Skull: 



