10 EGGS OF NORTH AMERICAN BIRDS. 



with darker; 1.15 -}- 1.40 to 1.10 + 1.50. Known by the 

 dark color, •vvith obscure markings, and small size. 



63. GuLL-MLLED Tern", Gelochelxdon nilotica. Eggs, 3 or 4, 

 short o^a!, yellowish buff to greenish, with rounded markings 

 of yellowish brown and lilac; 1.30-1-1.75 to 1.40 4-1.80. 

 Known from all other Terns by the short oval form. 



64. Caspian Teen, Sterna tschegrava. Eggs, 2 or 3, short 

 oval, greenish white, blotched with brown and lilac ; 1.85 -|- 

 2.90 to 1.90 -f 2.75. Distinguished from those of No. 65 by 

 the yellowish white color. Breeds throughout the Northern 

 Hemisphere ; in North America, northward, to the Gulf of St. 

 Lawrence, Virginia, Lake Michigan, Texas, Nevada, and Cali- 

 fornia, late in June. 



65. Royal Tern, Sterna maxima. Eggs, 2 or 3, rather 

 pyriform, white, spotted and blotched with rounded markings of 

 brown or lilac, many of which have yellowish edgings; 1.70 -{- 

 2.70 to 1.75 -}- 2.75. Eggs distinguished from those of No. 

 64 by the white ground-color. Breeds from coast of Virginia, 

 southward, throughout tropical America and on the west coast 

 of Africa, in June. 



66. Elegant Tern, Sterna elegans. Eggs, 1 or 2, oval, 

 purplish white, boldly marked with black, burnt sienna, and 

 and lilac; 1.45 + 2.20 to 1.50 + 2.25. Breeds on coasts of 

 Pacific, from California to Chili. 



67. Cabot's Tern, Sterna sandwicensis acuflavida. (Type, 

 Plate II.) Eggs, 1 or 2, oval, white, spotted and blotched with 

 bluish and reddish; 1.25 + 2.60 to 1.30 + 2.15. Known by 

 the oval form, size, and wliite color. Breeds from Florida, 

 southward, throughout tropical America. 



68. Trudeau's Tern, Sterna trudemd. Eggs, unknown. 

 Extralimital ; breeds m Southern South America. The bird 

 has been accidentally found in New Jersey and Long Island. 



69. Forster's Tern, Sterna forsteri. Eggs, 3 or 4, oval, 

 varying from nearly pure white to yellowish buff and greenish, 

 spotted and blotched irregularly with brown, umber, and lilac; 

 1.05 + 1.41 to 1.25 + 1.80. These are the palest of the me- 



