464 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY^ GENERAL REPORT. 
HESPEROMYS TEXAN US, Woodhouse. 
Hesperomys texana, Woodhouse, Pr. A. N. Sc. Phila. VI, Feb. 1853, 242.— Ib. Sitgreaves’Rep. Exp. Zuni, &c. 
1853, 48; pi. ii. Mammals. 
Jlrvicola ( Hesperomys ) texana, Aud. & Bach. N. Am. Quad. Ill, 1854, 319. 
Sp. Ch. —Size and proportibns about as in H. leucopus. Ears small; tail rather shorter than head and body. Color above 
reddish brown; brighter than in H. leucopus, and more like H. aureolus, but darker. No conspicuous wash of dusky on the 
back. Feet, belly, and under surface of tail pure white. Outside of fore leg like the back? 
I find it very difficult to characterize this species as distinct from R. leucopus, although it is 
very probable that the two are different. The proportions of the limbs are quite similar, 
although the posterior tubercle of the sole appears smaller and further hack. The sole is 
densely hairy from the heel to this tubercle. The tail is rather shorter than the head and 
body. The ears are rather smaller than usual. The general color above and on the sides is a 
reddish brown, brighter than in R. leucopus, or more like R. aureolus. The tint is quite 
uniform throughout, there being no indication of darker on the hack, as in the other. The 
under parts and feet are pure snowy white, the tail decidedly hicolor. The young are of much 
the same general plumbeous above as in R. leucopus. 
From the list of references it will be seen that the species at present is only recorded as found 
in the lower parts of Texas and along the Rio Grande to El Paso. 
List of specimens. 
| Catalogue number. j 
Corresp’ng No. of skull. 
s 
m 
Locality. 
When col¬ 
lected. 
Whence and how 
obtained. 
| Original number. 
Nature of 
specimen. 
Measurements. 
Collected by— 
o 
j Nose to occip. 
| Nose to tail. 
Tail to end of vert, j 
Tail to end of hairs. 
Length of fore feet, j 
Length of hind feet, j 
Length of skull. 1 
Width of skull. | 
2559 
Western Texas. 
Capt. L. Sitgreaves 
Skin in al. 
.50 
2.40 
.35 
.78 
Dr. Woodhouse. 
2654 
Fort Bliss, N. Mexico. 
Dr. S. W. Crawford 
In alcohol. 
.50 
.91 
1.18 
3.40 
2.84 
.82 
?145 
1127 
El Paso, Texas. 
Col. J. D. Graham. 
3.7o 
2.92 
3.05 
.80 
1.00 
J. H. Clark....'. 
1756 
o 
Western Texas....... 
Capt. Pope. 
1734 
o 
Waco Tanks, N. Mex. 
Oct. 3,1855 
....do. 
143 
44fc 
1582 
Pecos to Rio Grande. 
....1853_ 
Cpt. A. W.Wliipple 
..do. 
Dr. Kennedy... 
1037 
2217 
O 
Turkey Creek, Texas. 
Nov., 1854 
Major Emory. 
'Mounted . 
1.10 
.55 
.do. 
1038 
In alcohol. 
.43 
.85 
2.05 
.... 
.35 
.72 
579 
1702 
Chaco Escondido, Mex 
Mar., 1853 
Lt. D. N. Couch... 
Skin. 
2 79 
2.65' 
.80 
1802 
Brownsville, Texas. 
Capt. Van Vliet 
'Skull. 
.... 
1 
i 
HESPEROMYS GAMBELII, Baird. 
Sp. Ch.—V ery similar to H. leucopus in size and proportions. Feet perhaps shorter. Ears larger. Tail generally less than 
head and body, sometimes a very little longer. Above, yellowish brown, much mixed with dusky, but without a distinct broad 
wash of darker on the back. The entire outside of the fore leg below the shoulder, white? 
Body stout, with long fur. Ears very large, thinly coated with short hairs ; the antitragus 
distinct. Fore feet rather large, hind feet small. Tail shorter than the body, scarcely reaching 
beyond the ears when bent over ; the hairs only slightly elongated at the tip. One specimen 
(3G9) with 24 caudal vertebra?. 
