SACCOMYIDZ—DIPODOMYIN&—D, PHILLIPSI ORDI. 541 
Cuars.—Small: rather under than over 4 inches in length of head and 
body, with slender shape, large ears, long limbs, and especially long tail. 
Tail vertebrae 2 inches (more or less) longer than the head and body, bearing 
a proportion of about (rather more than less) 1.50 to 1.00. Coloration heavy : 
upper parts rather dark mouse-brown or even dusky in general tone, light- 
ened, especially on the sides, with the peculiar tawny shade of the genus. 
This animal served as the type of the genus described by Gray in 1840. 
It figures in various treatises, mainly under compilation. Audubon gave an 
excellent illustration, taken from the type-specimen. Macrocolus halticus of 
Wagner,* described soon afterward, is undoubtedly, as suggested by both 
Gray and Baird, the same animal, though no mention is made of the pouches. 
Some other unquestionable synonyms are cited above. 
DIPODOMYS PHILLIPSI ORDI, Woodh. 
Ord’s Pocket-rat ; ““Kangaroo Rat”. 
Dipodomys ordii, “‘ Woopu.”, LeC., Proc. Acad. Nat. Sci. Phila. vi, 1853, 224. (Notice of Woodhouse’s 
type.) —Woophu., Proc. Acad. Nat. Sci. Phila. vi, 1853, 235.—Woonu., Sitgr. Rep. Expl. Zuni and 
Col. R. 1853, 50, pl. 4. (El Paso, Texas.)—Avp. & Bacu., Q.N. A. iii, 1854, 317. (Compiled.)— 
Barrp, M. N. A. 1857, 410, pl. 5, f.1; pl. 21, f. 1; pl. 51, f.1, 2.—Bairp, P. R. R. Rep. x, 1859, 
Gunnison’s and Beckwith’s Route, Mamm. 8.—Barrv, P. R. R. Rep. x, 1859, Whipple’s 
Ronte, Mamm. 14.—Hayp., Trans. Amer. Phil. Soc. xii, 1862, 147. (Niobrara R.)—GeErr., 
Cat. Bones Br. Mus. 1862, 175.—Cours, Am. Nat. i, 1867, 395. (Habits.)—Gray, P. Z.S. 1863, 
201.—ALLEN, Proc. Bost. Soc. xvii, 1874, 42. (Yellowstone.) 
Dipodomys montanus, BAIRD, Proc. Acad. Nat. Sci. Phila. vii, 1855, 334. 
Dipodomys phillipsi ordi, Cours, Proc. Phila. Acad. 1875, 326.—Cours & Yarrow, Zodl. Expl. W. 100 
Merid, 1875, 109. 
Hasrrat.—Rocky Mountain region at large, and somewhat eastward, from 
the region of the Yellowstone into Mexico. Limit of southern extension not 
precisely determined. Specimens examined from the Yellowstone, Powder, 
Niobrara, Platte, and Arkansas Rivers; from various localities in Texas, and 
, b] ’ 
nearly throughout New Mexico and Arizona; from Sonora, Durango, and 
Coahuila, Mexico. 
Cuars.—Larger : rather over than under 4 inches in length of head and 
5 5 
body, with (comparatively) stout shape, small ears, short limbs, and short 
tail. Trail vertebrae 1 inch (more or less) longer than the head and bod 
5 ys 
bearing a proportion of about (rather less than more) 1.25 to 1.00. Coloration 
I 
light: upper parts nearly uniform tawny-brown, of the shade peculiar to the 
genus, darkened a little with mouse-brown on a dorsal area. 
* Beitriige zur Kenntniss der Siingethiere Amerikas. < Abhandl. d. math. phys. Classe d. kénigl. 
bayer. Akad. Miinchen, v, 1847-49, 319, pl. vii (forming vol. xxii of the series of Denkschriften). [Quoted 
from Baird.] 
