BROWN PTARMIGAN. ]73 



The following are the principal dimensions of several indivi- 

 duals. 



Length to end of tail 16f 



Extent of wings 25i 



Wing from flexure 8i 



Tail 4f 



Bill along the ridge ~\ 



Ed^e of lower mandible 1 



Tarsus 1 1 



First toe ■j% 



Claw of first toe j\ 



Second toe | 



Claw of second toe j\ 



Third toe lj% 



Claw of third toe ^ 



Fourth toe i§ 



Claw of fourth toe i 



Female. — The adult female is considerably smaller, and of 

 a somewhat less robust aspect, than the male. The supraocu- 

 lar membrane is smaller, being seven-twelfths of an inch long, 

 four-twelfths in height, and of a less vivid red. The bill, 

 claws, and iris, are as in the male. The ground-colour of the 

 plumage is of a yellowish brown tint, or of a lighter red than 

 that of the male. The dark transverse markings are broader 

 and more distinct, and the undulations are few^er on the back. 

 The quills are of a lighter brown, more tinged with grey ; the 

 secondaries more undulated, but duller. The four middle 

 feathers of the tail are like the back ; the rest all barred with 

 reddish except towards the tips, which are yellowish-grey. 

 The breast is dull brownish red, barred with brownish-black ; 

 the lower wing-coverts white, some of them brown, and others 

 barred. The whitish marks on the eyelids, and near the base 

 of the bill are duller. 



Length to end of tail 15i inches; extent of wings 25i ; 

 wing from flexure 8:^ ; tail 4{ ; bill along the ridge j% ; tarsus 

 If ; middle toe and claw 2. 



