24 EGGS OF NORTH AMERICAN BIRDS. 



southward, in the Rocky Mountains, to Colorado, and in Green- 

 land and Iceland. 



153. BuFFLE-iiEAD, Charito7ieUa albeola. Eggs, 6 to 12, 

 elliptical, smooth, greenish buff; 1.25-1-1.75 to 1.50-}- 2.03. 

 Known by the buff tinge, and small size. Nests placed in trees. 

 Breeds from Maine northward. 



154. Old Sqtjaw, Clangtda hyemalis. Eggs, 6 to 10, 

 elliptical, smooth, greenish ; 1.50 -|- 2.10 to 1.55 -|- 2.15. Nests 

 placed on the ground. Bi'eeds far north, in the Northern Hem- 

 isphere. 



155. Harlequin Duck, Histrioniciis histrioniciis. Eggs, 

 6 to 10, elliptical, smooth, greenish yellow ; 1.30 -)- 2.00 to 1.50 

 -|- 2.10 ; known by the yellowish green color and size. Nests 

 placed in holes of trees. Breeds from Newfoundland, the 

 northern Rocky Mountains, and the Sierra Nevada, northward, 

 and in Iceland. 



156. Labrador Duck, Camptolaimus labradorhis. Eggs 

 have never been described. Formerly breeding from Labrador, 

 northward, but probably now extinct. 



157. Steller's Duck, Eniconetia stelleri. Eggs, no identi- 

 fied specimens in collection. Breeds on Arctic coasts of the 

 Northern Hemisphere. 



158. Spectacled Eider, Arcionetta fisheri. Eggs, ellipti- 

 cal, pale olive gray ; 1.55 -|- 2.35 to 1.85 -|- 2.50. Breeds along 

 the coast of Alaska, northward, to Point Barrow. 



159. Eider, Somateria mollissima. Eggs, 6 to 10, elliptical, 

 smooth, greenish, sometimes blotched with darker ; 1.98 -}- 2.82 

 to 2.10-}- 32.0. Known by the large size. Nests placed on the 

 rocks. Breeds throughout the coasts of Northern Europe and 

 North-eastern North America, southward, to Labrador. 



160. American Eider, Somateria dresseri. Eggs, 6 to 10, 

 indistinguishable from those of No. 159. Breeds from Maine 

 to Labrador, in May. 



161. Pacific Eider, Somateria v nigra. Eggs, similar to 



those of No. 162. Breeds on the coast of the Northern Pacific, 



