MAMMALS OP TII.K MEXICAN BOUNDARY. 



327 



CITELLUS TRIDECEMLINEATUS TEXENSIS Merriam. 

 TEXAS THIRTEEN-LINED GROUND-SaXTIKREL. 



Spermophilus tridecemlineMus texends Merkiam, Proc. Biol. Soc. Waehington, XII, 



p. 71, Mar. 24, 1898 (original description). — Millek and Rehn, Proc. Boat. 



Nat. HiHt., XXX, No. 1, Dec. 27, 1901, p. 56 (Syst. Results Study N. Am. 



Mam. to close of 1900). 

 \_^p('rm.i)philus tridecemlineaius'] texensis, Elliot, Field Col. Mu.s., Zool. Ser., II, 



1901, p. 101. (Synop. Mam. N. Am.) 



Type-locality. — Gainesville, Cooke County, Texas. (Type, skin and 

 skull, No. \\\\^ collection of Dr. C. Hart Merriam.) 



Geograpldcal range. — Lower Austral zone in southern Texas. 



The original description of C'itellvti tridec'emlineatux texevf<in reads 

 as follows: 



Characters. — Similar to S. terelinaudus, but smaller; ground color of upper parts, 

 including base of tail, redder; middle stripe of underside of tail uniform deep reddish, 

 not grizzled with black; no yellowish -olive tinge in any pelage and less seasonal 

 difference in color than in any of the other forms. 



Color. — Winter pelage: Ground color of upper parts, including base of tail, rich deep 

 ferruginous or rusty, slightly grizzled with black hairs; nose grayish, slightly griz- 

 zled with rusty; sides of neck, feet, and underparts buffy; head marblings, dorsal 

 stripes and spots, chin and lips buffy-white; rusty underside of tail sometimes partly 

 hidden by bufty tips. Summer pelage: Similar to winter pelage, but ground color 

 duller and light stripes and spots more buffv. (Proc. Biol. Soc. Washington, XII, 

 p. 71.) 



Remarks. — Dr. J. A. Allen," referring to specimens collected in Bee 

 'County, Texas, b}' Mr. J. M. Priour, observes: "In coloration they 

 are not distinguishable from Minnesota examples." 



FrG. 50.— CITELLUS TRIDECEMLINEATUS. FORT SNELLING, MINNESOTA. (CAT. NO, 37212, U.S.X.M.) 



a, Dorsal view;, li, Ventral view. 



The following description of /S. tridecemlineatusis based on specimens 

 collected by the writer at Fort Snelling, Minnesota; bize rather large. 



a Bull. Am. Mus. Nat. Hist., Ill, No. 2, April 29, 1891, p. 223. 



