EGGS OF NORTH AMERICAN BIRDS. 25 



in the interior of the Great Slave Lake District, and in Eastern 

 Siberia. 



162. King Eidee, Somateria spectabilis. Eggs, 6 to 10, 

 elliptical, smooth, dirty green; 1.75 -f- 2.60 to 1.60 -j- 2.65. 

 Breeds in the Arctic region of the Northern Hemisphere. 



163. American Scoter, Oidemia americana. Eggs, 6 to 

 10, rather oval, smooth, pale yellow; 1.00 -|- 2.00 to 1.65 -f- 

 2.05. Nests on the rocks. Breeds in Labrador and the north- 

 ern interior, in May. 



164. Velvet Scoter, Oidemia fusca.. Eggs, 6 to 8, oval, 

 soiled creamy; 1.80 -f 2.60 to 1.85 + 2.65. Extralimital ; 

 Northern Old World; accidental in Greenland and Alaska. 



165. White-winged Scoter, Oidemia deglandi. Eggs, 6 to 

 12, indistinguishable from those of No. 164. Breeds in Labra- 

 dor and the fur countries, in May. 



166. Surf Scoter, Oidemia perspicillata. Eggs, 6 to 10, 

 elliptical, greenish buff; 1.60+2.25 to 1.65 + 2.30. Breeds 

 from Labrador, northward, and on the northern inland waters, 

 in May. 



167. Ruddy Duck, Erism,atura rubida. Eggs, 5 to 8, ellip- 

 tical, roughened conspicuously, buff; 1.80 + 2.30 to 1.85 + 

 2.55. Breeds throughout North America, in suitable locations, 

 in April and May. 



168. Masked Duck, N'omonyx dom,inictis. I have never 

 seen the eggs of this species, nor a description of them. 

 Extralimital ; tropical America ; accidental in Eastern North 

 America. 



169. Lesser Snow Goose, Chen hyperhorea. Eggs, oval, 

 dirty chalky white ; 2.18 + 3.38 to 2.25 + 3.45. Breeds in 

 Alaska, late in May. 



169a. Greater Snow Goose, Chen hyperhorea nivalis. 

 Eggs, 5 to 10, elliptical, yellowish white; 1.90 + 2.80 to 2.00 

 + 3.00. Breeds in the far north, late in May. 



170. Ross's Snow Goose, Chen rossii. Eggs, unknown. 

 Breeds in Ai-ctic America. 



