444 WEB-FOOTED BIRDS. 



Toes lon^. The female resembles that of the following species, 

 diifering only in the form of the bill. In the young of the year the 

 white space on the side of the bill begins to appear, and the feathers 

 of the head are black without reflections. — In the raale, the trachea, 

 about its middle swells out to 4 times its common diameter ; three 

 inches below this enlargement it enters the labyrinth, which is about 

 the size of a walnut and of a structure almost too complicated for 

 description; for a figure of it see Lin. Transact, iv. pi. 15. fig. 1, 2. 



ROCKY MOUNTAIN GOLDEN EYE. 



(Fuligula Barrovii. Clangula Barrovii, Rich, and Swains. North. 

 Zool, ii. p. 4.56. plate. 70.) 



Sp. Charact. — Head and upper part of the neck pansey-purple, 

 with a large white crescent before each eye ; the white speculum 

 separated from the band on the coverts by a black stripe. — Female, 

 as in the preceding ; but the bill, as in the male also, is shorter and 

 narrower towards the point. 



The habits of this species, so nearly related to the prece- 

 ding, are said to be wholly similar. It has hitherto been 

 found only in the valleys of the Rocky Mountains. Besides 

 the permanent difference in the bill, this species is further 

 distinguished by the purer color of its dorsal plumage, and 

 the smaller portion of white on its wing and scapulars. Its 

 long flank feathers are also much more broadly bordered all 

 round with black. 



Length of the species 22^ inches ; the wing 9^ inches ; the bill 

 above, 1 inch 4 lines ; the tarsus 1 inch 7 lines ; the middle and outer 

 toe each 2^ inches long. — In the male, the head and two inches of 

 the neck are bright pansey-purple, with a greenish reflection on the 

 ears. Forehead and chin brownish-black. Dorsal plumage, wings, 

 and broad tips of the long flank feathers, mostly velvet-black. The 

 crescent-shaped patch from the rictus to the sides of the forehead, 

 lower part of the neck, shoulders, tips of the outer scapulars, lower 

 row of lesser coverts, tips of the greater coverts, 6 secondaries and 



