MAMMALS OF THE MEXICAN BOUNDARY. 



329 



[Spermophilus mexicanus] parvidens, Elliot, Field Col. Mus., Zool. Ser., II. 1901, 



1>. 99 (Synop. Mam. N. Am. ). 

 [OUettus mexicanus] parvidens, Elliot, Field Col. Mus.. Zool. Ser., IV, L904, 



p. 146 (Mam. of Mid. Am. ). 



Type-locality. — Fort Clark, Kinney County. Texas. (Type, skin 

 and skull (fig. 52), No. 63073, U.S.N.M.) 



Geographical range. — Tamaulipan Fauna of Texas and Mexico. 

 Found on the Rio Grande from the mouth of the Devils River to 

 Brownsville and north along the Gulf coast to Corpus Christi. 



Description. Size larger than a Xerox/ ><-ri>n>/>h //>/*, but smaller than 

 Citelhts mexicanus Erxleben; pattern similar: colors paler, with 

 under surfaces white, not washed with yellowish brown: tail bushier, 



Pig. 52.— Citelltjs mexicanus parvidens. (Type, Cat. No. 63073, U.S.N.M.) 

 a, Dorsal view; b, Ventral view; e, Lateral view. 



its hairs with two instead of three black annuli, and grayish instead 

 of yellowish tips. Above, with about nine obscure and interrupted 

 white stripes on an olivaceous-gray ground. Tail flattened and 

 bushy, except at the base, which is cylindrical: color grayish white. 

 mixed with black, the lateral hairs twice banded with black, the outer 

 band twice as wide as the inner. Far conch short. Head hoary 

 grayish, with end of nose yellowish and orbital ring white. Under 

 surfaces white. Iris hazel. 



Specimens from the Gulf coast are yellower and more heavily col- 

 ored than those from Kinney County, Texas. 



