812 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
rately ascertained by Dr. A. L. Heermann in 1853, who at that time trans- 
mitted specimens to the Smithsonian Institution. The species was redescribed 
by Professor Baird in 1859, from Dr. Heermann’s specimen, and froma skin 
in alcohol received from Mr. J. G. Bell, who erroneously supposed it came 
from Wisconsin. Soon after this date, a large suzée of more than twenty 
specimens was received at the Smithsonian Institution from Mr. John Xantus, 
who collected them about San José and Cape Saint Lucas, at the southern 
extremity of the peninsula of Lower California. It has been since obtained 
by Dr. D.C. Peters, at Fort Massachusetts, N. Mex.; by Dr. Palmer, at Camp 
Grant, Ariz.; by Mr. F. Bischoff, in Nevada;* and by Mr. H. W. Henshaw, 
at Cove Creek, Utah, and in Southern California. 
extends from Northwestern New Mexico westward across Southern Utah and 
Its known range hence 
Southern Nevada to California, and southward along the coast to the southern 
point of Lower California. It probably extends in the interior far southward 
into Western Mexico. It is, however, essentially a species of the deserts. 
Mr. Henshawt+ speaks of it as living in communities, on dry sandy plains, 
It thus differs i habits from the other 
species of Tamias, which are all woodland species, and in its preference for 
where there is very little vegetation. 
open plains quite resembles the Spermophiles. 
TaBLE LXXVI.—WMeasurements of five skulls of TAMIAS HARRISI. 
3 Whe aan 4 ie 
3 z/2¢/s |e 2 | 
= i>} a cz -| 3 
c= | fet tan Asset REE festa ee ll 
= Fe ll er=te |b een be roa et aff eter ratte) Ell 
F Si Soles Se. Reese ge eer teed a ees 
3 é P g pears She etal ee cae Sy lesen 
E} Locality. f 3 Ps = E BE | 2 Sl rl ee To a 3 
3 A Se See ae Ws eS Be Eee tall t=! 
3 > Ss 3 S cs) o |2 =| oes) (ES) 4 [ioe | E 
3 ep eS a a alse .Jo 8) 8 |2S)eg] & 5 
bp a 2 3 2 Ss ToD hen Alrgi eal] a = 
J alal2laei3|]2lSe|8E! §)£2/e2/ 8] 2 
: a) Se ae | al a |e es) alee ie cree) ae 
iS) a) A}]oOl}A|A|AlaA Ib Ib pb |p |b HI A 
4239 | Cape St. Lucas, L. Cal.....-. Q | 1.67 | 0.95 | 0.40 | 0.48 | 0,12 | 0.22 | 0.55 | 0.85 | 0.23 | 0.14.| 0.26 | 0.92 | 0.47 
po) Ras § dO stesso ccenes one 2 | 1.60 | 0.90 | 0.40 | 0.47 | 0.15 | 0.24 | 0.52 | 0.85 | 0.25 | 0.16 | 0.28 | 0.93 | 0.47 
4146 |...-.. Woe teare rs. <.etaae saan 2 | 1.60 | 0.83 | 0.37 | 0.49 |...-..].-.... 0.48 | 0.21 | 0.25 | 0.16 | 0.30 | 0.89 | 0.45 
4147 |...... Oy? secaneseene=e seers Q | 1.53 | 0.85 | 0.33 | 0.47 |......]..-..- 0550)|||.0.:80)|s2s2ne|seaeus 0.28 | 0.89 | 0.46 
4136 | San José, L. Cal.........---.| ot | 1.62 | 0.88 | 0.40 | 0.48 |.-..-.}...-.. 0,50 | 0.81 | 0.25 | 0.16 | 0.30 | 0.89 | 0.45 
* Dr. Coues informs me that he has inspected a drawing of a specimen secured at Pyramid Lake, 
Nevada. 
t Ann. Rep. Chief Engineers for 1876, App. JJ, p. 311. 
