CITELLUS. 29 



Genl. Char. Smaller and darker than C. alleni. Zygomatic 

 arches heavier, more widely spread. 



Color. Nose yellowish brown; top of head and upper parts dark 

 chestnut-brown; six whitish stripes from head to tail, and four rows 

 of whitish spots between the pale stripes, the space between the 

 median stripes having a buff-white line from the nape to beyond 

 shoulders; outer side of arms and thighs deep buff; uhderparts, flanks, 

 and inner side of limbs cream color; lips white; tail above like back 

 at base, rest tinged black and whitish buff with a narrow marginal 

 line of the same color; beneath chestnut at base, rest like upper side; 

 hands buffy, feet whitish. Ex type in United States National Museum. 



Measurements. Total length, 232; tail, 70; hind foot, 32. Skull: 

 Occipito-nasal length, 37.2; Hensel, 28.5; zygomatic width, 10.7; 

 intertemporal width, 7.8; length of nasals, 8; length of upper molar 

 series, 3.2; length of mandible, 6.8; length of lower molar series, 5.9. 

 Ex type in United States National Museum. 



Subgenus D. Callospermophilus. 



Citellus trepidus (Taylor). 



Callospermophilus trepidus Taylor, Univ. Calif. Pub. Zool., V, 

 1910, p. 283. 



Type locality. Head of Big Creek, Forest Mountains, Humboldt 

 County, Nevada. Altitude, 8000 feet. 



Citellus lateralis tescorum (Hollister). 



Callospermophilus lateralis tescorum Hollist., Smith. Misc. Coll. ; 

 LVI, 1911, No. 26, p. 2. 



Type locality. Head of Moose Pass Branch of the Smoky River, 

 Alberta, Canada. Altitude, 7000 feet. 



Genl. Char. Nearest to C. I. cinerascens but larger, colors darker 

 and richer. 



Color. Nose, head, neck and shoulders Mars-brown; orbital ring 

 whitish ; upperparts grizzled brownish gray, darkest on rump ; shoul- 

 ders and outer sides of upperparts of arms blackish ; lateral black stripes 

 from shoulders have posterior half grizzled brownish gray ; inner 

 black stripes only go to middle of body; outer side of legs dark brown; 

 tail above mixed black and buff; beneath with a central cinnamon area, 

 with a lateral black band bordered with cinnamon-buff. Ex type in 

 United States National Museum. 



Measurements. Total length, 303; tail, 105; hind foot, 45. 

 Skull: Occipito-nasal length, 46.3; Hensel, 36.7; zygomatic width. 



