BACCOMTID^— DIPODOMTINJ?!— D. PHILLIPSI OBDI. 



541 



CiiABS. — Small: rather under than over 4 inches in length of head and 

 body, with slender 8hai)e, large ears, long limba, and especially long tail. 

 Tuil 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 gcnns described by Gray in 1840. 

 It figures in various treatises, mainly under compilation. Audubon guve an 

 excellent illustration, taken from the type-specimen. Miicrocolus halfkus 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'i Tookei-nt; "Kangtroo Bat". 



Dipoiomf oniti, " Woodh.", L«C., Proe. Acad. Mat. Rci. PhUa.. vi, 1853, 9SU. (Notice of Woodhonae's 

 typa.)— Woodh., Proo.Aead. Nat Svi. Pbi)«. vi, ISSt, 835.— WooOB., Sitgr. Bep. Eipi. Znlli aud 

 Col. a lKi3, 60, pi. 4. (El Paao, Texaa.)— Auo. tt Bach., Q. M. A. iil, 1854, 317. (Compiled.)— 

 Bairo, H. M. a. 1867, 410, pi. 5, f . 1 ; pi. ill, f. 1 ; pi. 51, f. 1, 8.— Baird, P. R. R Rep. x, \«Ji, 

 OanniaoD'a and Bockwith's Ronte, Uamni. 8.— Bawd, P. R. R. Rep. x, 1850, Wbipple'a 

 BoDte, Ifamm. 14.— Hayd., Traoa. Amer. Phil. Boo. xii, 1808, 147. (Niobrara R.)— Gkiir., 

 Cat. Bonea Br. Hoa. 1802, 176.-CouB8, Am. Nat. i, 1867, 396. (Uabita.)-aRAy , P Z. B. 1868, 

 Ml.— Allkn, Proo. Boat Boo. xvii, 1874, 43. (Txllowatone.) 



Dipoitmt* Moatemu, Baird, Pioo. Aoad. Nat. Sci. Phila. vii, 1855, 334. 



il^MiMiytjykKHjMionK, CouES, Proo. Pbila. Acad. 1876, 386.— CouM 4k Tariiow, ZoSI. EzpL W. 100 

 Uerid. 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 sli«pe, small ears, short limbd, and short 

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

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

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

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



* Beitrt|(e lar Kenntotia dar SSagetbiere Amerikaa. < Abhandl. d. math. phy*. Claaae d. kSnigl. 

 bayiir. Akod. Mttocben, v, 1847-49, 319, p]. Tit (forming vol. zzil of tbe terlea of DeukKbriftan). [(Quoted 

 bom BaU:d.] 



