SCIURIDAS—SPERMOPHILUS RICHARDSONI. — 849 
Spermophilus guttatvs GirBEL, Siiuget. 1855, 634 (in part; only the American references). 
Spermophilus townsendi BacHMaNn, Journ. Acad. Nat. Sci. Phila. viii, 1839, 61; Townsend’s Narrative, 1839, 
316.—AUDUBON & BacuMan, Quad. N. Amer. iii, 1853, 226, pl. exlvii, fig. 1—Barrp, Mam. 
N. Amer. 1857, 326.—HAYDEN, Trans, Amer. Phil. Soc. Phila. xii, 1863, 145,—Merriam, U. S. 
Geol. Surv. Terrs. Gth Ann. Rep, 1873, 664. 
Spermophilus townsendi var. townsendi ALLEN, Proce. Bost. Soc. Nat. Hist. xvi, 1874, 293. 
Spermophilus elegans KeENNIcOTT, Proc. Acad. Nat. Sei. Phila, 1863, 158.—Coorer, Proc. Cal. Acad. Sci. 
iv, 1869, 4 (Salt Lake, Utah, to Johnson’s Pass, Sierra Nevadas). 
Spermophilus richardsoni var. elegans ALLEN, Proc. Bost. Soc. Nat Hist. xvi, 1874, 292. 
Spermophilus armatus KENNICOTT, Proc. Acad. Nat. Sci. Phila. 1863, 158. 
Sreciric cHars.—Length to base of tail 7.00 to 9.50; of tail-vertebree 
2.25 to 3.50; 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 spots; sides fulvous, 
varying to brownish; beneath, grayish-white, washed faintly with fulvous, 
varying to strong rust-vellow or tawny.” Tail above darker than the back, 
edged with whitish; beneath, generally brownish-yellow, with a partly con- 
cealed subterminal black band. ars small, pointed, one-sixth to one-fourth 
of an inch high. ‘Tail short, flattened, generally more or less bushy, 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. 
Richardson's Spermophile. 
VarieraL 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 450. Above, light yellowish-brown, varied with 
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 summer 
(July and August) by Dr. Coues at different points along the 49th parallel, 
54 M 
