processes more developed; upper incisors long and wide. (Nord- 

 quist.) 



Color. Summer Pelage. Above, head and body blackish brown; 

 sides of head, neck and body grayish brown. Dorsal line smoky 

 black tipped with tawny; rump black. Orbital ring white; cheek and 

 nose rusty black; chin, throat, lower part of neck, rest of under parts 

 and lower parts of limbs white; fore feet tawny gray, hind feet whit- 

 ish. Ears brownish black mixed with tawny; tawny gray and black 

 inside; posterior borders white, tips black. Whiskers white. Some 

 black hairs at base of tail above. 



Pelage. Entirely white except black tips to ears, and soles of 

 feet, which are yellowish white. Weight 12-14.5 pounds. 



Measurements. Total length, 610-710; tail vertebrae, 70-80; hind 

 foot, 170-179; ear, 130-135. Skull: greatest length, 108-115.5; 

 greatest breadth, 55-5-56; length of nasal, 41.5-46; breadth of nasals 

 at base, 23-25; width upper incisor at tip, 2.6; alveolar width of upper 

 incisor, 3; alveolar length of upper molar series, 20. 



416. othus. {Lepus), Merr. , Proc. Wash. Acad. Scien., igoo, p. 28. 

 Type locality. St. Michaels, Alaska. 



Genl. Char. Size large, winter pelage white except tips of ears, 

 which are black. 



Skull, as compared with L. tschukshorum, differs in having the 

 " frontals slightly broader interorbitally; nasals narrower and less 

 flattened; supraoccipital shield narrower, much longer than broad; 

 jugal decidedly narrower, longer posteriorly, and with muscular 

 impression on outer face decidedly narrower anteriorly; basioccipital 

 narrower; incisive vacuity smaller." 



Measurements. "Hind foot, 174. Skull: basal length, 86.5; 

 zygomatic breadth anteriorly, 49; at widest point, 52; postpalatal 

 length, 46.5; greatest breadth across postorbital processes, 39; great- 

 est breadth of nasals posteriorly, 22; anteriorly, 20." (Merr.) 



417. poadromus. (Lepus), Merr., Proc. Wash. Acad. Scien., 1900, p. 29. 

 Type locality. Stepovak Bay, Alaska Peninsula. 



Genl. Char. Smaller than L. othus; hind feet and tail shorter; 

 skull narrower. 



Color. Head fulvous; orbital ring buffy; ears fulvous and black 

 anteriorly, white posteriorly, with basal third of anterior margin 

 white; back, sides and hind legs gray mixed with black and buff; fore 

 legs grizzled grayish fulvous; dull fulvous on upper side of feet; hind 

 feet white. Tail dusky on upper median line, rest grayish white; 

 grayish collar on throat; breast, middle of belly and inner sides of 

 legs white. 



