Mar. 1898. NORTH AMERICAN MAMMALS ELLIOT. 203 



roots, those on the sides and beneath thighs and outer side of 

 arms below, plumbeous at the base, tips white. Tail medium 

 length, bicolor, brownish black above, gray beneath. Collectors' 

 measurements taken in the flesh: Total length, 416 mm.; tail, 

 193; hind leg, 40; ear, 33. No especially different cranial char- 

 acters from JV. fnscipes. 



23. Neotoma fuscipes streatori. 



Neotoma fuscipes streatori. Merr. Proc. Biol. Soc. Wash., 

 vol. ix, 1894, p. 124. 



Twenty specimens from the Snow Mountains, Calusa Co. 



I refer these examples to the subspecies described by Dr. Mer- 

 riam (1. c.), from Carbondale Amidor Co. The hind feet are 

 pure white in most of the specimens, but in some the colors of 

 the ankles extends on to the feet in much the same manner as 

 does the black on the same part in N. fuscipes. The ankles are 

 dusky in some individuals, rufous in others, and the general 

 color of the adults, is a bright rufous, darkest in the center 

 of the back, differing in this respect from the dark grizzly brown 

 strongly suffused with fulvous of the type specimen, but as that 

 was taken in April and these examples in September and Octo- 

 ber, the difference of season may account for the change of 

 color. In size they agree generally with the measurements given 

 of the type. The character to distinguish this subspecies from 

 its relatives is that the hairs of the under side of the body 

 are all white to the roots, save a narrow line along the side, where 

 they are plumbeous at the base. This is not mentioned by Dr. 

 Merriam in his description, but I should be more inclined to rely 

 upon it than on almost any other character given. There is so much 

 individual variation in the skulls of all the members of the N. 

 fuscipes group that it is very difficult, if not impossible, to distin- 

 guish the various species and races by these alone, and any 

 assistance towards this end that can be obtained from color or 

 its distribution is very welcome. 



The following table will serve to distinguish the above forms: 



Tail Tail Hairs 



long. short. Unicolor. Bicolor. white to roots. 



Neotoma fuscipes x .... x Throat & belly. 



" " annectens. x x " 



Central portion 

 x of underparts. 



.-,- . , T ,. Central portion 



affinls Medm ' x of underparts. 



i . Entire portion 



fuscipes streator, of und ^ rparts . 



