40 CLASS AVES. 



Ptarmigan Grous. Lath. Tetrax> Lagopus. L. 

 Enl. 120 and 494. British Zoology, pi. M. 3. 

 Naum, 1st Ed. Sup. 61. f. 115, 16. 



The summer plumage is yellow, marked with small 

 black lines, (and in this plumage it is the Tet, 

 Rupestris of Lath.) Found in all the high moun- 

 tains, where it remains during winter in holes 

 which it makes in the snow. 



In winter, they are pure white ; tail, black ; with 

 the two middle feathers and tips, white ; the male 

 with a black spot on the lores, which is wanting in the 

 females; their bill is feeble and compressed at the end; 

 the claw subulate and arched. 



Willow Grous. Lath. Tetrao Albus. Gm. T, 

 Saliceti. Tern. Edw. 72. Frisch. 110, 11. 



Of all the north ; is larger, and has the summer 

 dress redder; the belly remains white. In the 

 summer dress it is the Tet Lapponicus, Lath. 



Its bill is strong, short, depressed, and blunt at the 

 tip ; its claws, long and white, and scarcely round ; 

 and in the winter there is no difference between the 

 sexes. Found in the North of Europe and America. 



The Tetrao Mutus, of Mutis ; the T. Lagopus, 

 of Retz ; in summer, the T. Cachinans, of Retz, and 

 the Rehusak Grous, of Latham. 



There is, however, in Scotland, a Ptarmigan 

 which does not change colour in winter. It is 



