476 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT, 
List of specimens. 
| Catalogue number. 
o 
o 
Sex and age. 
Locality. 
When col¬ 
lected. 
Whence and how 
obtained. 
Nature of 
specimen. 
Measurements. 
Collected by— 
| Nose to eye. 1 
| Nose to ear. 
| Nose to occiput j 
| Nose to tail. 
J Tail to end of vert, j 
S 
| Length of fore ft. | 
| Length of hind ft. | 
| Length of skull. | 
| Height of ear. | 
Skin. 
In alcohol. 
Dr. G. Suckley 
.... do. 
.57 
1.00 
1.15 
3.28 
2.70 
.35 
.79 
1.10 
1.17 
3.40 
2.60 
.35 
.80 
.50 
.93 
1.13 
3.05 
2.16 
.35 
.65 
....do. 
.58 
91 
1.17 
3.00 
2.50 
.40 
.85 
Dr.F.Y.Hayden 
.52 
.90 
1.13 
3.00 
2.12 
.80 
.do. 
.47 
.80 
2.30 
2.03 
.65 
.50 
.95 
1.15 
3.18 
2.93 
.38 
.75 
.do. 
_do. 
.55 
1.00 
1.17 
3.12 
2.40 
.40 
.84 
2552 
.50 
.95 
1.15 
3.10 
2.46 
.40 
.74 
2553 
do. . 
.50 
.90 
1.05 
2.75 
.30 
.78 
2554 
.50 
.90 
1.07 
2.65 
2.00 
.40 
.77 
2555 
1.00 
1.16 
3.00 
2.50 
.45 
.82 
2556 
.53 
1.00 
1.13 
3.00 
2.40 
.40 
.72 
do...... 
2557 
. 
Fort Union ,. 
.51 
.90 
1.15 
2.66 
2.58 
.37 
.80 
Yellowstone... - T .. T . 
Skin. 
1780 
... .do.., T .. 
1781 
Aug. 6,’56 
Aug.16, ’56 
1783 
July 28, ’56 
T ,, t do., ,,, 
_do. 
1784 
Aug.16, ’56 
__ T r . do. 
1398 
2234 
Q 
Little Missouri. 
1.00 
3.42 
2.25 
2.42 
1399 
2235 
$ 
1.08 
3 49.2.33 
2.50 
1.03 
.do. 
651 
1865 
Fort Pierre, Neb. 
Uni. A. Vail orb an 
1.06 
702 
1865 
1.17 
3.08 
2.75 
2 93 
1.03 
. do. 
703 
. 
Q 
1.00 
2.75 
2.25 
0 ’ 33 
1927 
North Platte river.... 
Aug.21,’56 
Lt. F. T. Bryan.... 
In alcohol. 
.45 
.73 
1.00 
2.40 
.35 
.73 
W. S. Wood. 
1928 
Medicine Bow river. . 
Aug. 7,’56 
...do . 
.50 
.87 
1.09 
2.60 
2.20 
.35 
.73 
1932 
Engelmann Creek of 
Oct. 13, ’56 
.45 
.75 
.95 
2.19 
1 65 
.70 
. do . 
Rep Fork. 
1933 
1.04 
. do . 
144 
1126 
Santa Cruz, Sonora 
Col; J. D. Graham. 
Skin . • • ■ 
3.74 
2.65 
.80 
J. II. Clark.. 
146 
1128 
3.25 
1.93 
2.00 
.28 
.75 
147 
1129 
3209 
El Paso, Tex . 
Head.... 
1.12 
542 
Fort Thorn, N. M 
Dr. T. C. Henry 
Skin . 
.50 
3.75 
2 25 
.39 
.75 
.60 
543 
3.70 
1 
2.20 
.76 
544 
. do . 
........ do. 
.... do.. ■... 
3.80 
2 25 
.77 
545 
r ° 
2.12 
.80 
1 
HESPEROMYS MICHIGANENSIS. 
Prairie Mouse. 
Mus michiganensis, Aud. & Bach. J. A. N. Sc. Phil. VIII, n, 1842, 304.— Ib. N. Am. Quad. Ill, 1854, 326. 
Hesperomys michiganensis, Wagner, Wiegmann’s Archiv, 1843, ii, 51. 
i Miis bairdii, Hoy & Kennicott, Agricultural Report U. S. Patent Office for 1856, (1857,) 92; pi. xi. 
Sp. Ch. —Smaller than H. leucopus; ears and feet much smaller and shorter. Above, blackish brown; crown of the head 
almost black; sides of the adult with an intermixture of grayish yellow brown ; a district dorsal wash of darker ; beneath* 
snowy white. Upper surface of fore and hind feet dusky to the base of the toes. Tail white beneath. Maximum length of 
head and body, usually 3.00; tail one inch to half an inch shorter; hind foot seldom exceeding 0.70; never 0.75. 
