116 CITELLUS. 



xygomatie arch widely expanded; occipital region low and broad; 

 axygos process on palatal arch. 



lor. 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 

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



Metisitreinents. Total length, 476.2; tail vertebras, 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, n; pal- 

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

 length of lower tooth row, 1 1 . 



226. Citellus annulatus (Audubon and Bachman). 



Spermophilus aininlntns And. <S: Bachm., Jour. Aead. Xat. Scien. 



Phil., 1842, p. 319. 

 Citellus (inniihitits Elliot, Mamm. Middle Amer. & W. Indies, F. 



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



RlNG-TAlLKD SPK k M OPII I I. H . 



Type Lhdlity. Western Mexico? 



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

 western Mexico; extent of range unknown. 



a. Citi'lliix a n n ii I a I ii s <_;<>l <l nut n i (Merriam). 



Spermophilus auuulatns ^ohlnnuii Merr., Proc. Biol. Soc. Wash., 



XV, 1902, p. 69. 

 ('itellns <iiDin/iiins <yA/w</;/7 Elliot, Mamm. Middle Amer. ^ \Y. 



Indies, F. ('. M. Pub., [V, Pt. I, iqc>4, p. 151. Zool. Ser. 

 (MIL UMAX'S SpKk.MopiiiLK. 



Type loiiilily. Santiago. Territory of Tepic, Mexico. 

 '. I >istr. Linn1> of raii''e unknown. 



227. Citellus adocetus Merriam. 



('itellnx i/iA'i c///.v Merr.. Proc. hiol. Soc. \\'ash., XVI, 1^03, p. -<). 

 Kllim. Mamm. Middle Amer. \- \V. Indies, F. C. M. Pub., iv, 

 IM . i, 1^04. 1 1. 152. Zool. Ser. 

 Pi. UN-TAILED Sl'KkMoiMll I I 



Type A '//// r. La Salada. forty miles south of Uruapan, State of 

 Miehoacan. .Mex; 



GeogT. I'i^tr. State ot Michoaean. Mexico. 



