174 MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 



of tail. Tail colored like back with some scattering white hairs at tip (ex- 

 treme tip apparently missing). Forefeet and lower foreleg white ; hind feet 

 white only on toes and inside border. Whiskers mixed brown and white. The 

 color areas occupied respectively by brown and white are almost exactly 

 divided in equal parts. Compared with the type of rixosus and another 

 summer specimen from Moose Factory, Hudson Bay, the type of alleghenien- 

 sis is much darker and duller hued. 



"Measurements (of type, a well-mounted specimen, but undoubtedly 

 stretched). Total length, 199; tail without hairs of tip, 19; hind foot, 20. 

 Skull: Basilar length, 29; zygomatic width, 15.3; mastoid width, 14; inter- 

 orbital constriction, 6 ; greatest mandibular length, 16.5. 



"Description of two other specimens. No. 4279, Coll. of S. N. Rhoads; 

 young adult (sex undetermined), cotype, in late winter early pelage, collected 

 by aforesaid R. Hawkins, near Beallsville, Washington county, Pa., about the 

 year 1885 or 1886. 



" Color. Everywhere pure white except on head, where brown summer fur 

 is appearing, also about 15 dark brown and blackish hairs at tip of tail. 



"Measurements (specimen is a mummy, preserved without skinning, having 

 been eviscerated, poisoned and wired to a stand erect on its haunches. On 

 this account its tail and body measurements are of real value after allowing 

 an increase of five per cent, for shrinkage of intervertebral tissue). Total 

 length, 145; tail vertebrae, 22; hind foot, 20. bkull : Basilar length, 28; 

 zygomatic width, 14.7 ; greatest mandibular length, 15.8. 



No. -^p, adult female, Coll. of the Carnegie Museum, collected by Wil- 

 liam Seager, near Leetsdale, Allegheny county, Pa., April 25, 1898. This 

 interesting specimen is in the shape of a cabinet skin, with anterior half of 

 skull attached to lips and without sex mark or measurements on label. I 

 have determined its sex by the series of teats, evidently those of a female 

 having nursed young the previous season. The skull and teeth indicate full 

 maturity. The pelage is changing from winter to summer garb, this change 

 appearing to have but recently begun. 



" Color. White, except an irregular mottled stripe of brown, well defined 

 on head between nose, eyes and ears, narrowing along neck and back with 

 wider areas at shoulders and hips and disappearing on hind rump. Tail white 

 with about 20 brown-black hairs at tip almost concealed by surrounding white 

 hairs. A faint mottling of brown is appearing on all four legs and the upper 

 hind feet. 



"Measurements (skin stretched). Total length, 175; tail, 22; hind 

 foot, 20. 



"The two Beallsville specimens were kindly loaned to me October 27, 

 1899, by Mr. Jacob Nease, of Washington, Pa., in response to a circular, 

 widely distributed in the State, requesting information concerning certain 



