864 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
TabLtr CVII.—Measurements of two skulls of SPERMOPHILUS TERETICAUDUS. 
A S 3 2 A 
; Ziele les = 3 
z alee |23heliee% 
Bs |e le ales ees eal 
5 2 | Sed shee | ere (ee le eal Naeem less 
2 : g a z Ss ia os 9 a | sale 5 SO 
i 4 2 n m fy a Ba - aS 
a Locality. ‘ ce] E ne E Ee Z Dip} 2 Bela =} D 
5 Ay less Pali cea ts ina ||": ILeepeses | cra LE Fe ee 
a t e 3 ° o o aoe Aa 5 “Si Shleez = ze 
2 = a a Fh Eg PS S leolss!] & a 
& ele|/e]2|/8|8 |S#/8s5| 8 |Fal/as| ei) @ 
ep x 3 a 2 2 a | eeu see fata ee |e fa, @ |rgse Bel = et 5 
i=] ~ = = = = = =< ew oO 
a a) Sole tal) Be ck hye le Se Bree) ee Meares eee 
3 wl os z pea a & qe |a&Ablaa| & farslach & E 
oO a) a o i= A A Alp B Bb |p i=) = A 
2419 | Fort Yuma, Cal..-.....-...--. o |} 1.42 | 0.85 | 0.32 | 0.45 | 0.12 | 0.20 | 0.38 | 0.74 | 0.20 | 0.15 | 0.30 |+0. 80 | 0.45 
1585 |....-- tees eS Sesser Soe ce Ce ee oe Oe ee ee ee Se ees el ssc] feeesal [seea| Pca al |e ane emg eed 
TaBLE CVIII.—List of specimens examined of SPERMOPHILUS TERETICAUDUS. 
al ‘ . 
° a 
3 Ei 2 
2 pe P| 
fae = 
=a A| o = 
3 Se SS Locality. From whom received. Collected by— = 
5 Siler Vee 
gel/ac]a E 
SEleBo/]y } - “ 
ie bio — | | rs 
ie} 5) D A 
| ——— 
1534 | 2419 |....| Fort Yuma, Cal..... -....-......-...... | Maj. G. H. Thomas....| Maj. G. H. Thomas. .-..| Skin and skull. 
2490 |....- (O} lies es 0)... se sac ene Re ee nee see eeeeet EEeeee OEE reseed sacere dQ@\o- ene -----| Alcoholic. 
1585 |...--. Frail 5, a": doce eee sche eee eee don fit en. le oa do. 
Teen Sooee Ce fal (eee CORE RS Sine osacece s Sede eno HY ast a8 seeeoad pass" (Win se-b4 -----do. 
| EE, 
SPERMOPHILUS SPILOSOMA Bennett. 
Sonoran Spermophile. 
Spermophilus spilosoma BENNETT, Proce. Zod). Soc. i, 1833, 40 (“ California” ).—RICHARDSON, Zodl. Beechey’s 
Voy. 1839, Mam. 12*.—WaGner, Suppl. Schreber’s Siiuget. iii, 1843, 251 (foot-note).—AUDU- 
BON & BACHMAN, Quad. N. Am. pl. cix, folio ed.—Barrp, Proc. Acad. Nat. Sci. Phila. 1855, 
332; Mam. N. Am. 1857, 321; U. 8S. and Mex. Bound. Surv. ii, pt. ii, 1859, 39, pl. vii, fig. 3 
(head and feet). : 
Spermophilus mexicanus AUDUBON & BACHMAN, Qaad. N. Am. iii, 1853, 39 (in part). 
Spermophilus spilosoma var. spilosoma ALLEN, Proc. Bost. Soc. Nat. Hist. xvi, 1874, 291. 
SPECIFIC CHARS.—Length of head and body 6.50 to 7.00; of tail to end 
of vertebree 250 to 3.00; to end of hairs 825 to 375. Above, reddish- 
brown, with indistinct subquadrate spots of white, bordered posteriorly. with 
black. The spots are most distinct on the hinder part of the baeK, and are 
more distinct in the young than in the adult. Beneath, white, ‘varying to 
strongly yellowish-white. Tail above colored like. the back, with a single 
broad subterminal black bar, extending for only a short distance along the 
sides; beneath, centrally, brownish-yellow, with a black border edged with 
The tail (vertebrae alone) is less than half the length of the body, 
The 
yellowish. 
round, generally bushy only at the tip, and not distinctly distichous. 
