540 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 



peculiar tawny or fulvous of the genus, deepened somewhat on a dorsal area 

 with mouse-brown. 



These arc simply observed matters of fact, not open to question. Cer- 

 tain differences which actually exist, as well as the insensible blending of these 

 diiferences, may both bo fairly signalized by the following formulae of nomen- 

 clature and description, in which the various names winch have been proposed 

 are relegated to their proper place, covering diagnosis of typical (i. e. extreme) 

 characters, and indication of the region in which such form more especially 

 prevails: — 



DTPODOMYS PHILLIPSI,* Gray. 

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



Dipodomys phillipu, Gray, Ann. Mag. N. H. vii, 1841, 521 ; Rep. Brit Assoc. Adv. Sci. for 1841, 1842, Trans, 

 of tbe Sections, 70. Real del Monte, Mex. (Type of genus.) — Wagn., " Suppl. Scbreb. iii, 

 1843, 295."— LeC, Proc. Acad. Nat, Sci. Phila. vi, 1853, 224. (Sacramento Valley, Cal.)— GlEB., 

 Sang. 1855, GOO. (Compiled.)— Baird, M. N. A. 1857, 412. (California, &c.)— Coop. & Sucki.., 

 P. R. R. Rep. xii, 1859, Mamm. 100, 127. 



Dipodomgs philiipsii, Gisay, Aid. Jotirn. Sci. xlii, 1842, 335 ; List. Mamm. Br. Mus. 1843, 120.— Gems., Cat. 

 Bones Br. Mus. 1862, 173.— Gray, Proc. Zool. Soc. 1868, 200. 



Dipodomys philippi, Sciiinz, Syn. Minim, ii, 1845, 93. (Compiled from Gray.) 



Dipodomys phillippsii, At'D. & Bach., Q. N. A. iii, 1853, 137, pi. 130. (From Gray's type.) 



Dipodomys pkillippii, Baird, P. R. R. Rep. x, 1859, Williamson's Route, Mamm. 82. (Posa Creek, Cala.) 



Dipodomyx phillipai, COUES, Proc. Phila. Acad. 1875,325. 



Macrocohtx hallicm, WAGNER,-Arch. f. Naturg. 1846, 176 ; "Abb. K. Baier. Akad. xxii, 1848, 319, pi. vii ".— 

 Gieiiel, Siiug. 1855, 599. (Compiled.) 



Dipodomya agilis, Gamb., Proc. Acad. Nat. Sci. Phila. iv, 1848, 77. t (Los Angeles, Cal.)— Gamb., Ann. Slag. 

 Nat. Hist, iii, 1849, 318 (same).— LisC., Proc. Acad. Nat. Sci. Phila. vi, 1853, 224.— Aud. & 

 Bach., Quad. N. A. iii, 1851, 339. (Compiled.)— Gieb., Sang. 1855, 600. (Compiled.)— Bd., 

 Proc. Acad. Nat. Sci. Phila. 1855, 334 (San Diego, Cal.) ; M. N. A. 1857, 414, pi. 9, f. 1.— Gray, 

 P. Z.S. 1868, 201. 



Dipodomijs heermanni, LkC, Proc. Acad. Nat. Sci. Phila. 1853, 224. (Sierra Nevada.) 



Dipodomys hecrmannii, Baird, Mamm. N. Am. 1857,415. (Compiled.) 



Dipodomys hermannii, Gray, P. Z. S. 1868, 201. (Compiled.) 



Dipodomgs wagnerij LeC, Proc. Acad. Nat. Sci. Phila. 1853, 224.— Bd., M. N. A. 1857, 415. (Compiled.) — 

 Gray, P. Z. S. 1868, 201. (Compiled.) 



Habitat. — Pacific region at large, from Washington Territory to Cape 

 St. Lucas; Nevada; and portions of Mexico (Real del Monte, Phillips). 

 Specimens examined from Fort, Walla-Walla, Cape St. Lucas, and numerous 

 localities nearly throughout Upper and Lower California. 



'This name is found variously spelled by authors, as well as by Gray himself ; but if, as stated by 

 Gray, tbe species was named after John Phillips, the rendition here adopted appears to be correct. 



t Special paper: Description of Two New California!) Quadrupeds [D. agilis and Mus califonii- 

 cns]. < torn. tit. pp. 77, 78. (Also, Ann. Mag. Nat. Hist. lorn. cil. pp. 318, 319, with some literal modifica- 

 tion of title.) 



{The ascribed locality is unquestionably erroneous. Tbo label "James Reed, South Carolina", 

 like that on some other specimens of various animals I have seen, indicates the donor aud his residence. 



