814 MONOGRAPHS OF NORTH AMERICAN KODENTIA. 
TAMIAS LATERALIS (Say) Allen. 
Say’s Chipmunk. 
Sciurus lateralis Say, Long’s Exped. ii, 1823, 46.—Hartan, Faun. Amer. 1825, 181.—GopMan, Am. Nat. 
Hist. ii, 1826, 144.—H. S17, Griffith’s Cuvier’s An. King. v, 1827, 255.—WaGner, Schreber’s 
Siiuget. iv, pl. cexiv, B—FiscuEr, Synop. Mam. 1829, 350. 
Arctomys (Spermophilus) lateralis RicHaRDson, Zool. Journ. iii, 1828, 519; Fauna Bor.-Am. i, 1829, 174, 
1. xiii. 
ee Ga “F, Cuvier’s Suppl. Buffon, i, Mam. i, 1831, 335”.—WaGNeEk, Suppl. Schreber’s 
Siiuget. iii, 1843, 252.—Branpt, Bull. Classe Physico-math. Acad. St. Pétersb. ii, 1844, 380.— 
AuDUBON & BACHMAN, Quad. N. Am. iii, 1853, 62, cxiv.—GIEBEL, Siiuget. 1855, 638.— Bairp, 
Mam. N. Am. 1857, 312, pl. xx, fig. 3 (head and feet); pl. xlv, fig. 5(skull).—Cooper, Proc. 
Cal. Acad. iv, 1869, 4—MrErriaM, U. S. Geol. Surv. Terr. 6th Ann. Rep. 1873, 664. 
Tamias lateralis ALLEN, Proc. Bost. Soc. Nat. Hist. xvi, 1874, 290.—Cours & Yarrow, Wheeler’s Expl. 
and Surv. West of 100th Merid. v, Zo6l. 119 (Apache, Arizona).—HENSHAW, Ann. Rep. Chief 
Engineers for 1876, App. JJ, 1876, 311 (Southern California). 
Speciric cHARs —Largest of the genus. Length of head and body 7.25 to 
8.00; of tail to end of vertebrae about 3.25; to end of hairs 4.35. Above, yellow- 
ish-gray, with two broad stripes of white and four of black, which extend from 
the shoulders to the hips. No central dorsal line. Sides of neck and shoulders, 
and often the whole upper surface of the head, dark rufous or chestnut, varying 
greatly in intensity in different specimens; posterior edge of thighs and sides 
of rump also rufous, but paler than the sides of the neck and shoulders. 
Beneath, yellowish-white, the yellowish tint strongest on the breast. Eye- 
lids white, with an indistinct pale ocular stripe. Tail above, blackish, varied 
with whitish and edged with pale yellowish; middle of the tail below, pale 
yellowish-brown, varying to reddish-cinnamon and chestnut, with a subter- 
minal bar of black and yellowish-white edging. 
The present species varies greatly in color, even among.specimens from 
the same locality. The light stripes on the sides of the back range from 
nearly pure white to pale yellow; the black stripes by which they are enclosed, 
from pale brownish-black to intense black. Of the dark stripes, the outer is 
generally considerably broader than the inner; sometimes they are equal in 
width; the inner is occasionally entirely obsolete, and in about one-third of 
the specimens before me is less than one-fourth the width of the outer and 
much shorter, while in rare instances it is considerably wider than the outer. 
Occasionally the stripes are all only indistinctly indicated. The general color 
of the upper surface varies from whitish-gray to reddish-gray. In some speci- 
mens, the head and neck are scarcely more rufous than the back; in others, 
the upper surface of the head is much more strongly rufous than any other 
portion of the animal. To describe these variations more in detail :—No. 
