ERETHIZON. 035 



hiidsoniiis, DeKay, N. Y. Zool., i, 1842, p. 27, pi. xxv, fig. i, 

 pi. viii, 2, a. />. c. 



Type locality. Eastern Canada. 



Geogr. Distr. Canada west to Saskatchewan Plains, south to 

 central Maine and northern New Hampshire and west of Connecticut 

 Kiver nearly to border of Massachusetts. Formerly it extended along 

 the Alleghanies through Pennsylvania into Virginia and possibly to 

 Kentucky. North it goes to the limit of trees. 



Genl. Char. Light tips of long hairs of dorsal surface yellowish 

 white; average length of nasals usually equal the interorbital breadth, 

 or about one-third the length of skull. Nasal not extending to 

 orbits, or one-third length of skull. 



Color. Brownish black varied with yellowish white; (juills white 

 at base with terminal third usually black; a few are sometimes all 

 black or all white; length of quills very variable; beneath brownish 

 black. 



Measurements. Total length, 900 to 1200: tail vertebra?, 150. 



405. epixanthus. {Erithn'zon), Brandt, M(§m. Acad. St. Petersb., 

 1S35, p. 389, pi. I, 9. 

 pilosus, Peale (ntcRich.), U. S. Expl. Exped. Mamm., 1848, p. 46. 



Type locality. California and Unalaska. 



Geogr. Distr. From upper Missouri south in the mountains to 

 New Mexico, west to the Pacific, northward from California to 

 Alaska, probably to the tree limit. 



Genl. Char. Light tips of long hairs of dorsal surface greenish 

 yellow; average length of nasals exceed interorbital breadth, or over 

 one-third the length of skull. Nasals extending backwards to the 

 orbits, or two-fifths length of skull. 



Color. Similar to E. dorsatus, except tips of long hairs are 

 greenish yellow instead of yellowish white. Central line of belly 

 sooty brown. Spines yellowish on the back, on the sides whitish 

 tipped with brown. 



Measurements. Total length, 825; tail vertebra, 165. 



a. couesi. (Erithrizon), Mearns, Proc. U. S. Nat. Mus. , 1897, p. 723. 



7y/>e locality. Fort Whipple, Arizona. 



Geogr. Distr. Arizona and New Mexico. 



Genl Char. Smaller than /". <f//.V(Z«M//j^, paler coloration; audital 

 bulla; greatly developed. 



Color. Above brown, dorsum covered with white quills tipped 

 with brown; long stiff hairs whitish at base. Muzzle, feet and under 

 parts brown mixed with gray. 



Measurements. Skull: total length, 86; audital bulla:, 21 x 16.7. 



