826 MONOGRAPHS OF NORTH AMERICAN RODENTIA 
5. Size small; above strongly reddish-brown, with indistinct subquadrate spots of reddish-white, 
not arranged in rows; tail very narrow, about half the length of the head and body; 
below reddish-brown, with an indistinct narrow line of black; ears very small, almost obso- 
lete. Habitat, Southern New Mexico, Southwestern Texas, and Eastern Mexico..SPILosoMa. 
6. In size and general form similar to the last; above dull yellowish-brown, indistinctly spotted 
with lighter. Habitat, from the Black Hills and Fort Kearney westward to the Great 
Basin. 220 cons oon sean eennnieces mn seeee= soe Bab eSdso3 SHS OS Sosa ssbeeosgscas OBSOLETUS. 
III. Skull very long and narrow, the nasal portion relatively broad and very long; zygomatic arches 
rather weak, not widely spreading ; first upper premolar of medium size, about one-third as 
large as the second ; tail quite long, the vertebrx alone nearly two-thirds to more than two- 
thirds the length of the head and body; ears small; general form of the body long and 
ECG Gy te Se sane Cobo os osesca ne ocoes ono Sea Soe Ss so5-55 oslo ses 55 ICTIDOMYS. 
7. Above yellowish-brown, finely varied with gray; below yellowish-white ; tail cylindrical, concolor 
with the body; ears nearly obsolete. Habitat, vicinity of Fort Yuma, Southern Cali- 
LO HNE oo6555 poss Caen Serdca saosin cosessdss2- 3500S Sasa cosecicsiess ssssssssce TERETICAUDUS. 
8. Above dark reddish-brown, inclining to olivaceous, with subquadrate spots of white rather regu- 
larly arranged in nine to eleven rows; tail about two-thirds the length of the body ; beneath 
dull brownish-yellow, with a band of black. Habitat, Southern New Mexico, Southwestern 
Texas, and southward into Mexico (to Vera Cruz?)...-..-.----- Fe sci Sn MEXICANUS. 
9. Larger; above dark brown, mixed with reddish, varying to pale brown and blackish-brown, with 
six to eight light continuous lines, alternating with five to seven rows of light spots; tail 
generally about two-thirds of the length of head and body, rather narrow; below yellow- 
ish-brown centrally and edged with yellowish, between which is a very broad band of 
black..< 225 S< cocc cose eee EE Eee eee 3 JStgo 855 2650 tse ohe 563 TRIDECEMLINEATUS. 
a. Darker above; the light lines rather narrow. Habitat, the prairies of the United States 
northward to the Saskatchewan... .----. . 2. - ce5+ e205 wee ewe e ooo wee var. tridecemlineatus. 
b. General color much paler, with the light lines and spots broader. Habitat, the dry plains 
and deserts westward to the Great Basin....-..-.---- See an Bos arose coc var. pallidus. 
10, Large; above yellowish-brown, varied with black, the light and dark markings forming indis- 
tinct subquadrate spots; head grayer; tail two-thirds the length of the head and body, 
rather ful] and bushy, whitish, with three bands of black; ears small, but distinct. Hab- 
itat, Northern Illinois and Missouri, northward to latitude 64°........-....---. FRANKLINI. 
Incerta sedis. 
11. (Cranial characters unknown.) Size medium; ears large; tail with hairs nearly as long as the 
body; form highly Sciurine; above varied yellowish-brown and black; sides of neck and 
shoulders and outer side of limbs strongly reddish-brown ; beneath yellowish, the color of 
the dorsal surface nearly meeting on the middle of the ventral surface; tail above marked 
with broad transverse bars of black, alternating with narrower bars of brownish- 
yellow; lower surface strongly reddish-yellow. Habitat, Plains of Colima, Western 
Moxieoreso. 25d sa ses ccinawets te soe bee eo een eee seen pees Seecesesce aaa ANNULADUSS 
SPERMOPHILUS GRAMMURUS (Say) Bachman. 
Lined-tailed Spermophile. 
Var. GRAMMURUS. 
Rocky Mountain Lined-tailed Spermophile. 
Sciurus grammurus Say, Long’s Exped. to the Rocky Mts. ii, 1833, 72.—HArLan, Faun. Amer. 1825, 182.— 
Gopman, Amer. Nat. Hist. ii, 1826, 136.—H. Situ, Griffith’s Cuvier’s An. King. v, 1827, 255.— 
FiscuEr, Synop. Mam. 1829, 350. 
Spermophilus grammurus BACHMAN, Charlesworth’s Mag. Nat. Hist. iii, 1839, 390.—WaGNER, Suppl. Schre- 
ber’s Siiuget. iii, 1843, 253—Branpzv, Bull. Classe Physico-math. Acad. Imp. Sci. St. Pétersb. 
ii, 1844, 380.—Scuinz, Syn. Mam. ii, 1845, 74.—Barrp, Proc. Acad. Nat. Sci. Phila. 1855, 334; 
Mam. N, Amer. 1257, 310, pl. iv, animal; U.S. and Mex. Bound. Surv. ii, pt. ii, 1859, 38.— 
Cougs, Amer. Nat. i, 1867, 360; Proc. Acad. Nat. Sci, Phila. 1867, 135.—MxerriaM, U.S. Geol. 
Surv. Terr. 6th Ann, Rep. 1873, 663.—ALLEN, Bull. Essex Inst. vi, 1874, 66.—Couns & Yar- 
Row, Rep. Expl. and Sury. West of 100th Merid. vy, Zod]. 1875, 121. 
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