90 MAMMALS OF UTAH 



LONG-TAILED POCKET MOUSE 



PEROGNATHUS FORMOSUS (Merriam) 



Perognathus formosus Merriam, N. A. F. No. 1, 17, October 25, 

 1889. 



Description — Color : Above, grizzled sepia ; - below 

 white; sides not noticeably lighter than back; dark hairs 

 generally extending down front leg to forearm; ears dusky 

 black, tuft of bristly hairs at base mixed black and whitish ; 

 subauricular spot small, noticeable only in very high pelage ; 

 feet white ; tail buff to pencil below, buff mixed with dusky 

 above, intensifying toward pencil, which is brownish black. 

 Worn pelage, drab instead of sepia. Young : Smoky gray 

 above, white below. (Osgood.) 



Distribution — Southwestern Utah, southern Nevada, 

 and the adjoining portion of California in the lower Sono- 

 ran zone. The type locality of this species is St. George, 

 Utah. 



Family ERETHIZONTIDAE 



Subfamily ERETHIZONTINAE 



WESTERN PORCUPINE: YELLOW- 

 HAIRED PORCUPINE 



ERETHIZON EPIXANTHUM (Brandt) 



Erethizon epixanthus Brandt, Mem. Acad. Imp. Scien. St. 



Petersb., 6th Ser, 1835, p. 390, pis. 1, 9. Elliot, Syn. N. 



Am. Mamm., F. C. M. Pub. II, 1901, p. 265. Zool. Ser. 

 Erethizon epixanthum Elliot, Mamm. Middle Amer. and W. 



Indies, F. C. M. Pub. IV, Pt. I, 1904, p. 397, figs. 76, LIV. 



Zool. Ser. 



Description — The general appearance of the animal is 

 black and somewhat greenish yellow, due to the long outer 

 hairs, which project three inches beyond the quills and 

 short hairs, and are black with an inch or more of the tips 

 yellow. These long hairs are wanting on the rump. The 

 quills are yellowish with blackish tips, and are found all 

 over the sides and upper parts, including tail,, but not on 

 nose. Mingled with the quills are short black hairs. Sides 

 of belly with yellow hairs, middle with black. The long 



