S ACCOM YIDJ3— DIPODOMYI2JLE— D. PHILLIPSI OEDI. 541 



Chars. — 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 vertebra 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 uncpiestionable synonyms are cited above. 



DIPODOMYS PHILLIPSI ORDI, Woodh. 



Ord's Pocket-rat; "Kangaroo Rat". 



Dipodomys ordii, " Woodh.", LeC, Proc. Acad. Nat. Sci. Phila. vi, 1853, 224. (Notice of Woodhouse's 

 type.)— Woodh., Proc.Acad. Nat. Sci. Phila. vi, 1853, 235.— Woodh., Sitgr. Rep. Expl. Zn&i and 

 Col. R. 1853, 50, pi. 4. (El Paso, Texas.)— Aud. & Bach., Q. N. A. iii, 1854, 317. (Compiled.)— 

 Baird, M. N. A. 1857, 410, pi. 5, f . 1 ; pi. 21, f. 1 ; pi. 51, f. 1, 2.— Baird, P. R. R. Rep. x, 1859, 

 Gunnison's and Beckwitli's Route, Mamru. 8. — Baird, P. R. R. Rep. x, 1859, Whipple's 

 Ronte, Manim. 14.— Hayd., Trans. Aiuer. Phil. Soc. xii, 1862, 147. (Niobrara R.)— Gerr., 

 Cat. Bones Br. Mus. 1862, 175.— Couks, Am. Nat. i, 1807, 395. (Habits.)— Gray, P. Z. S. 1868, 

 201. — Ali.en, Proc. Bost. Soc. xvii, 1874, 42. (Yellowstone.) 



Dipodomys montanus, Baird, Proc. Acad. Nat. Sci. Phila. vii, 1855, 334. 



Dipodomys phillipsi ordi, Coues, Proc. Phila. Acad. 1875, 326.— Coues & Yarrow, Zool. Expl. W. 100 

 Merid. 1875, 109. 



Habitat. — 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 

 nearly throughout New Mexico and Arizona; from Sonora, Durango, and 

 Coahuila, Mexico. 



Chars. — Larger: rather over than under 4 inches in length of head and 

 body, with (comparatively) stout shape, small ears, short limbs, and short 

 tail. Tail vertebras 1 inch (more or less) longer than the head and body, 

 bearing a proportion of about (rather less than more) 1.25 to 1.00. Coloration 

 light: upper parts nearly uniform tawny-brown, of the shade peculiar to the 

 genus, darkened a little with mouse-brown on a dorsal area. 



* Beitrage zur Keuntniss der Saugethiere Amerikas. < Abhandl. d. math. phys. Classe d. konigl. 

 bayer. Akad. Miiuchen, v, 1847-49, 319, pi. vii (forming vol. xxii of the series of Denkschrifteu). [Quoted 

 from Baird.] 



