116 CITELLUS. 



zygomatic arch widely expanded; occipital region low and broad; 

 azygos process on palatal arch. 



Color. Top of head from forehead to between ears jet black 

 mixed with a few tawny hairs ; nose tawny ochraceous ; sides of head 

 mixed tawny ochraceous and black; back and sides black and tawny 

 ochraceous, the black predominating; under parts buffy ochraceous; 

 hands and feet buff, ankles tawny; limbs mixed buff and black; 

 tail above mixed buff and black appearing gray with a black border 

 and pale buff fringe, beneath mixed buff and black; ears black. 



Measurements. Total length, 476.2; tail vertebrae, 184; hind foot, 

 60. Skull: occipito-nasal length. 60.5; zygomatic width, 39; inter- 

 orbital constriction, 15.5; width of postorbital processes, 27; brain- 

 case above zygomata, 25.3 ; length of braincase, 31 ; median length of 

 nasals, 19; lateral length, of nasals, 20; length of pterygoids, 11; pal- 

 atal length, 30; length of upper tooth row, 12 ; length of mandible, 36; 

 length of lower tooth row, 11. 



226. Citellus annulatus (Audubon and Bachman). 



S pernio pJiiliis aiuinlattts Aud. & Bachm., Jour. Acad. Nat. Scien. 



Phil., 1842, p. 319. 

 Citellus annulatus Elliot, Mamm. Middle Amer. & W. Indies, F. 

 C. M. Pub., IV, Pt. I, 1904, p. 151. Zool. Ser. 

 Ring-tailed Spermophile. 



Type locality. Western Mexico? 



Geogr. Distr. Plains of State of Colima and Territory of Tepic, 

 western Mexico ; extent of range unknown. 



a. Citellus anniilatus ^oldmain (Merriam). 



S pernio phil lis annulatus goldmani Merr., Proc. Biol. Soc. Wash., 



XV, 1902, p. 69. 

 Citellus annulatus goldmani Elliot, Mamm. Middle Amer. & W. 

 Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 151. Zool. Ser. 

 Goldman's Spermophile. 



Type locality. Santiago, Territory of Tepic, Mexico. 

 Geogr. Distr. Limits of range unknown. 



227. Citellus adocetus Merriam. 



Citellus adocetus Merr., Proc. Biol. Soc. Wash., xvi, 1903, p. 79. 

 Elliot, Mamm. Middle Amer. & W. Indies, F. C. M. Pub., iv, 

 Pt. I, 1904, p. 152. Zool. Ser. 

 Plain-tailed Spermophile. 



Type locality. La Salada, forty miles south of Uruapan, State of 

 Michoacan, Mexico. 



Geogr. Distr. State of Michoacan, Mexico. 



