348 



NORTHERN ZOOLOGY. 



Younger females have the brownish-orange and yellowish-brown bars more conspicuous over 

 the whole plumage above and below, but particularly on the neck, and the black and white 

 less pure and in smaller quantity. The tail also more mottled ; the terminal bar narrower. 



Form. — Bill smaller than that of T. umbellus. No distinct crest, although the feathers of 

 the crown are capable of erection. Third and fourth quills equal and longest. Tail, of 

 sixteen feathers, considerably rounded. Tarsus thickly feathered, particularly behind, where 

 the feathers are long and hair-like. Some tufts of feathers spring from the short webs that 

 connect the anterior toes. Toes naked and pectinated. 









Dimensions. 















Inch. 



Lin. 





Inch. 



Lin. 





Inch. 



Lin. 



ngth, total 



17 







Length of bill to rictus 



. 



n 



Length of middle nail 



. 



6 



„ of tail 



5 



6 



,, of tarsus . . 



1 



5 



,, of hind toe 







H 



„ of wing 



■ 7 



4§ 



,, of middle toe . 



. 1 



5 



,, of its nail 



. 



H 



„ of bill above 







7 















The old females are of nearly equal dimensions. — R. 



Female from Great Bear Lake. 



[125.] 4. Tetrao Franklinii. (Dougl.) Rocky Mountain Spotted Grouse. 



Tetrao Franklinii. Douglas, Linn. Trans., xvi., p. 139, sp. 4. 

 Tetrao Canadensis, var. Bonap. Orn., iii., p. 47, pi- 20 ; male. 



Plate lxi. Male. 



There is such a close resemblance between this and the common Canadian 

 Grouse (T. Canadensis), that the Prince of Musignano considers it only as a 

 variety ; and this opinion is entertained also by Mr. Drummond, a very acute 

 practical observer : the latter had ample opportunities of studying the manners 



