2 EGG8 OF NORTH AMERICAN BIRDS. 



Breeds in Texas, Southern California, South America, south to 

 Paraguay, and West Indies. 



6. Pied-billed Grebe, Podilymhus podiceps. (Type, 

 Plate I.) Eggs, 4 to 7 ; 1.15 + 1.65 to 1.25 -j- 1.85. The most 

 common species. Breeds throughout North America and South 

 America, Buenos Ayres, West Indies, and Bermudas, late in 

 June in the more northern localities. 



FAmLT II. — URINATORID^. Loons. 



Eggs, deep greenish-brown, varying individually in intensity 

 of color, spotted and blotched with very dark brown. 



Nests, composed of a mass of grass, weeds, etc., placed in 

 marshy places near the water. 



7. Loon, Urinator imber. (Type, Plate I.) Eggs, 2 or 3 ; 

 2.15 -f 3.50 to 2.35 + 3.85. Breeds throughout the Northern 

 States, northward, during the early part of June. 



8. Yellow-billed Loon, Urinator adamsii. Eggs, indis- 

 tinguishable from those of No. 8. Breeds in Arctic America, 

 west of Hudson Bay. 



9. Black-throated Loon, Urinator arcticus. Eggs, 2 or 

 8; 1.90 -j- 2.90 to 2.00 -|- 3.00. Smaller than those of No. 1. 

 Breeds in northern part of Northern Hemisphere, in early June. 



10. Pacific Loon, Urinator pacificiis. Eggs, 2 or 3 ; 1.85 

 -\- 2.10 to 1.95 -|- 2.80. Breeds on Northern Pacific coast of 

 North America, in June. 



11. Red-tiiroated Loon, Urinator lumme. Eggs, 2 or 3; 

 1.75 -f 2.65 to 1.90 -f- 3.00. Breeds in northern part of 

 Northern Hemisphere. 



Family III. — ALCID^. Auks, Murres, and Puffins. 



Eggs, pyriform, occasionally white, but often brilliantly col- 

 ored and conspicuously marked. No material used for the nests. 



12. Tufted Puffin, Lunda cirrhata. Eggs, 1, white; 

 1.40 -f- 2.40 to 1.S5 + 3.00. Larger than those of No. 13. 

 Breeds on the coasts and islands of North Pacific, in July. 



