I ' 



MONOGRAPHS OP NOltTfl AMBItlOAN KODENTIA 



;il .^!l 



3i!,:5:; 



lli 



Hi :'; 



6. Sizo smnll ; above Htronfjly rcdiUnb-brown, with indistinot snbqnailrote spoU of reddlsb-whito, 



not arrauKed in rows ; tail very narrow, about half the leoRth of the bead and body ; 



• , , :. below reddisb-brown, witb an indintinct narrow line of blauk ; oars very email, almoat obao- 



Ilabitat, Soutborn Now Mexico, Sonthweatern Tezaa, and Eaatem Mexico. . bviumomh. 



G. In size und general form eimilar to the last; above dull yellowisb-browu, indiatlnotly spotted 



witb lighter. Habitat, from the Black IlilU and Fort Kearney westward to the Great 



Basin oBSOLBTUs, 



III. Skull very long and narrow, the nasal portion relatively broad and very long; zygomatic arches 

 rather weak, not widely spreading ; first opper premolar of medinni size, about one-third as 

 large as the second ; tail qnite long, the vertebtie alone nearly two-thirds to more than two- 

 tbirds the length of the head and body ; ears small ; general form of the body long and 

 Blender ICTIDOMY8. 



7. Above yellowish-brown, finely varied with gray; below yellowish-white ; tail oylindrioal, ooncolor 



with the body; ears nearly obsolete. Habitat, vieinity of Fort Ynma, Bootbem Cali- 

 fornia TBRBTICAUDUS. 



8. Above dark reddish-brown, inclining to olivaoeons, with snbqnadrate apots of white rather tt/u- 



larlf arranged in nine to eleven nxte; tail about two-tbirds 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 Cms T) mkxioanus. 



0. Larger ; above dark brown, mixed with reddish, varying to pale brown and blackish-brown, with 

 six to eight light continuous lines, alternating witb five to seven rows of light spots; tail 

 generally about two-thirds of the length of bead and body, rather nanvw ; below yellow- 

 ish-brown centrally and edged with yellowish, between whiob is • very broad band of 



black TBIDKCBMUNBATU8. 



a. Darker above; the light lines rather narrow. Habitat, the prairies of the United States 

 northward to the Saskatchewan var. <rid«»aiUKea(iM. 



h. General color mnch paler, with the light lines and spots broader. Habitat, the dry plains 

 and deserts westward to the Great Basin ,.var.^(MM. 



10. Largo; above yellowish-brown, varied with black, the light and dark markings forming indis- 



tinct Bobqoadrate spots ; head grayer ; tail two-thirds the length of the head and body, 

 rather full and bushy, whitish, with three bands of black ; ears smalt, bat distinet. Hab- 

 itat, Northern Illinois and Missouri, northward to latitude 64° vrakkuni. 



Incerta ledie. 



11. (Cranial characters unknown.) Size medium ; ears large ; toil with hairs nearly as long as tho 



body; form highly Scinrine; 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 ; toil above marked 

 '~ with broad transverse bars of black, alternating witb narrower bars of brownish- 



yellow; lower surface strongly reddish -yellow. Habitat, Plains of Collma, Western 



Mexico AMMULATtW. 



Ml 



SPERMOPHILUS GRAMMURUS (Say) Bachman. 

 IiIned-taiM SperHopkUe. 



Var. OBAHMUBUS. 



Bockf Mointaln Ilned-UIIetl Spermophlle. 



Sctnrtit grammuriu Say, Long's Exped. to the Bocky Mts. ii, 1H33, 73.— Hahlan, Faun. Amer, 18SS, ISit.— 



GoDMAN, Amer. Nat. Hist, ii, 18£0, 136.— H. Smith, Griffith's Cnvier's An. King, v, 1637, 8S5.— 



FJ8UIIBR, Synop. Mam. 1839, 350. 

 S^mopMltu grammurut Bachman, Charloswortli's Mag. Nat. Hist, ill, 1839, 390.— Waomrr, Snppl. Sehre- 



ber's Siiuget. iii, 1843, 353— Brandt, Bull. Classe Physico-math. Acad. Imp. Sci, 8t.Ptftersb. 



ii, 1644, 380.— SciiiNZ, Syn. Mam. ii, 1846, 74.— Baird, Proo. Acad. Nat. Sci. Phila. 1865, 334 ; 



Ham. N. Amer. 1857, 310, pi. iv, animal ; U. 8. and Mez. Bound. Snrv. ii, pt ii, 1660, 38.— 



Codes, Amer. Nat. i, 1807, 360 ; Proo. Acad. Nat. Sci. Phila. 1867, 135.— Mkhriam, U. 8. Geol. 



Burv. Torr. Ctb Ann. Rop. 1873, 663.— Allkn, Bull. Essex lust, vi, 1674, C6.— Couae it. Yar. 



ROW, Rep. Expl. and Burv. West of 100th Merid. v, Zoiil. 1675, 131. 



i-Si^mmmimm 



