A New Subspecies of Porcupine 5 
Immature animal: Like the adult but general color much paler 
and duller, owing to the very much heavier overfur; with the 
greenish-yellow apical portion of the long hairs much more ex- 
tended, involving the exposed one-half to two-thirds of the hairs, 
so that the general color of the sides, shoulders and neck is almost 
all greenish-yellow; whitish hairs of forehead and posterior 
cheeks much more numerous ; underfur brownish sooty to brown- 
ish black; quills of lower back and rump more yellowish, a clear 
pale yellow ; spinous bristles on sides of tail more strongly yellow, 
the ventral spinous bristles wholly brownish yellow; legs so 
heavily overlaid with gray-tipped hairs that the prevailing color 
of the limbs is gray. (Description of paratype 9; September.) 
Measurements of Type ¢.— Length to end of vertebrae, 797; 
length to end of tail hairs, 878; tail vertebrae, 202; tail to end of 
hairs, 283 ; hind foot, 117. Weight 2214 pounds. 
Measurements of Paratype 9—Length to end of tail hairs 865 ; 
tail vertebrae, 199; hind foot, 98. Near Roseberry Ranch in 
Cherry county, north of Mullen, Nebraska, September 12, 1914. 
2 subadult (No. 285, Collection of State Entomologist, University 
ef Nebraska). Carl Kiehl, collector. 
Erethizon epixanthum was described by Brandt in 1835 from 
specimens collected in California and Unalaska. Mearns in 1897 
selected California specimens as typical of E. e. epixanthum in 
his cranial comparisons with E. e. couest, and Merriam in 1900 
described FE. e. myops from the Alaska Peninsula, thus restricting 
FE. e. epixanthum to the California form which he designated as 
“typical.” Evidently, the assumption has been adopted by these 
two mammalogists that California is the type locality of E. e. 
épixanthum. 
Compared, then, with an adult 9 specimen of typical E. e. 
epixanthum from California (Independence Lake, Nevada 
county, July 22, 1910, L. Kellogg; Mus. Vert. Zool., 12642) the 
Nebraska animal is slightly larger (the California specimen is 745 
mm. long; tail vertebrae, 200; hind foot, 120), except that the 
hind foot is comparatively shorter, and the general coloration is 
paler because the long, bristle-like hairs are mostly pale yellowish 
gray or greenish-yellow-tipped, with but few wholly black ones 
119 
