SCIURID^E— SPERMOPHILUS RICBARDSONI. 849 



Spermophilus guttatvs Gikbel, Siiuget. 1855, G34 (in part; ODly the Americau references). 



Spermophilus townsendi BachmaN, Journ. Acad. Nat. Sci. Phila. viii, 1839, 61 ; Townsend's Narrative, 1839, 



316.— Audubon & Bachman, Quad. N. Amer. iii, 1853, 226, pi. cxlvii, fig. 1. — Baird, Mam. 



N. Amer. 1857, 326.— Hayden, Trans. Amer. Phil. Soc. Phila. xii, 1863, 145.— Merkiam, U. S. 



Geo). Surv. Terrs. 6th Ann. Rep. 1873, 664. 

 Spermophilus townsendi var. townsendi Allen, Proc. Bost. Soc. Nat. Hist, xvi, 1874, 293. 

 Spermophilus elegans Kennicott, Proc. Acad. Nat. Sci. Phila. 1863, 158. — Coopeb, Proc. Cal. Acad. Sci. 



iv, 1869, 4 (Salt Lake, Utah, to Johnson's Pass, Sierra Nevadas). 

 Spermophilus riehardsoni var. elegans Allen, Proc. Bost. Soc. Nat Hist, xvi, 1874, 292. 

 Spermophilus armatus Kennicott, Proc. Acad. Nat. Sci. Phila. 1863, 158. 



Specific chars. — Length to base of tail 7.00 to 9.50 ; of tail-vertebrce 

 2.25 to 3.5l> ; of tail to end of hairs 3.50 to 4.59. General color above, yel- 

 lowish-brown, varying on the one hand to grayish and on the other to dusky, 

 with or without rather distinct small light and dark snots; sides fulvous, 

 varying to brownish; beneath, grayish-white, washed faintly with fulvous, 

 varying to strong rust-yellow or tawny. Tail above darker than the back, 

 edged with whitish; beneath, generally brownish-yellow, with a partly con- 

 cealed subterminal black band. Ears small, pointed, one-sixth to one-fourth 

 of an inch high. Tail short, flattened, generally more or less bush}', but 

 sometimes quite terete ; nose short and broad ; general form rather thick and 

 stout ; pelage fine and soft. Varies in size and color with locality, becoming 

 smaller and darker southward, with larger ears. 



Var. RICHARDSONI. 



Ricliarchon's Spermophile. 



Varietal chars. — Length of head and body 8.50 to 9.00, ranging from 

 about 8.00 to 9.50 ; of tail to end of vertebra 3.00 to about 3.50; of tail to 

 end of hairs 3.75 to about 4 50. Above, light yellowish-hrown, varied witli 

 dusky, generally indistinctly mottled with pale tawny and dusky ; sides of the 

 body, nose, outer side of limbs, and buttocks pale rusty-yellow ; beneath, yel- 

 lowish-white, varying from white, faintly washed with pale fulvous, to deep 

 tawny ; paler on the throat and middle of the breast. Tail gray, varied with 

 black above, bright tawny or brownish-yellow below, with a partly concealed 

 bar of black near the end, edged both above and below with yellowish-white. 

 The hairs of the sides of the tail are crossed by a single broad bar of black, 

 which increases in width toward the end of the tail. There is also usually 

 a narrow bar of black at the extreme base of the hairs. 



A series of nearly sixty specimens of this variety, collected in summei 

 (July and August) by Dr. Cones at different points along the 49ih parallel, 

 54 M 



