100 



Dimensions. in. lines. 



Height of ear posteriorly 6 



Palm to end of middle fore-claw 1 4 



Heel and middle hind-claw 1 10 



Sciufus Hudson'ms, (Pennant). The Chickaree Hudson's Bay 



Squirrel. Red Squirrel. 

 Common Squirrel. Foster, Phil. Trans., vol. 62, p. 378, an. 



1772. 

 Sciurus vulgaris, var. E. Erxleben Syst., an. 1777. 

 Hudson's Bay Squirrel. Penn. Arct. Zool., vol. 1. p. 116. 

 Common Squirrel. Hearne's Journey, p. 385. 

 Red Barking Squirrel. Schoolcraft's Journal, p. 273. 

 Red Squirrel. Warden's United States, vol. i. p. 330. 

 Ecureuil de la Bale d'Hudson. F. Cuvier, Hist. Nat. de Mam. 

 Sc. Hudsonicus. Harlan. Godman. 



The Hudson's Bay Squirrel, a well-known species, is a third 

 smaller than the Northern Gray Squirrel ; tail shorter than the 

 body; ears slightly tufted. Colour, reddish above, white beneath. 



Dental formula : incis. ?^ can. ^, mol. 4^, = 20. 

 Sciurus Richardsoni. Columbia Pine Squirrel. 



Small Bro\\Ti Squirrel. Lewis and Clarke, vol. iii. p. 37. 



Sciurus Hudsonius, var. /3. Columbia Pine Squirrel. Richardson, 

 Fauna Boreali- Americana, p. 190. 



Smaller than Sc. Hudso7iius ; tail shorter than the body ; rusty 

 gray above, whitish beneath ; extremity of the tail black. 



This small species was first noticed by Lewis and Clarke, who 

 deposited a specimen in the Philadelphia Museum, where it still 

 exists. I have compared it with the specimen brought by Dr. 

 Townsend, and find them identical. Dr. P>,ichardson, who appears 

 not to have seen it, supposes it to be a mere variety of the Sciurus 

 Hudsonius. On the contrary. Dr. Townsend says in his Notes, 

 " It is evidently a distinct species ; its habits being very different 

 from those of the Sciurus Hudsonius. It frequents the pine-trees 

 in the high range of the rocky mountains west of the great chain, 

 feeding upon the seeds contained in the cones. These seeds are 

 large and white, and contain much nutriment. The Indians eat a 

 great quantity of them, and esteem them good. The note of this 

 squirrel is a loud jarring chatter, very different from the noise of 

 Sc. Hudsonius. It is not at all shy, frequently coming down to 

 the foot of the tree to reconnoitre the passenger, and scolding at 

 him vociferously. It is, I think, a scarce species." 



The difference between these two species can be detected at a 

 glance by comparing the specimens. The present species, in addi- 

 tion to its being a fourth smaller and about the size of the Tamias 

 Lysteri, has less of the reddish brown on the upper surface, and 

 may always be distinguished from the other by the blackness of its 

 tail at the extremity, as also by the colour of the incisors, which 

 are nearly white, instead of the deep orange of the Hudsonius. 



The upper incisors are small and of a light yellow colour ; the 



