EGGS OF NORTH AMERICAN BIRDS. 121 



612. Cliff Swallow, PetrocJielidon lunifrojis. Eggs, 4 

 or 5, long oval, white, spotted and blotched with reddish brown 

 and lilac ; .65 -|- .80 to .60 -|- .70. Nests, gourd-shaped, com- 

 posed of mud, and placed under the eaves of buildings or on 

 cliffs. Breeds throughout North Amei-ica, in May and June. 



613. Barn Swallow, Chelidon erythrogaster. (Type, Plate 

 X.) Eggs, 4 to 6, oval white, spotted and blotched with red- 

 dish and purplish brown ; .50 -f- .75 to .56 -f- .94. Nests placed 

 in buildings, composed of mud and straws, lined with feathers. 

 Breeds throughout North America, from the fur countries 

 southward, excepting the more southern portions, in June. 



614. Tree Swallow, Tachycineta hicolor. Eggs, 4 to 6, 

 long oval, white, unspotted ; .45 -\- .63 to .55 -\- .83. Nests 

 placed in holes of trees, cavities in buildings, and in martin 

 boxes. Breeds throughout North Anuerica, from tlie fur coun- 

 tries southward, excepting the more soutliern portion, in June. 



615. Violet-green Swallow, Tachycineta thalassina. 

 Eggs, 4 to 6, oval, white ; .45 -|- .75 to .50 -f- .80. Nests 

 placed in holes of trees, or in cavities of rocky cliffs, composed 

 of straw, and lined with feathers. Breeds in Western United 

 States, from the eastern base of the Rocky Mountains to the 

 Pacific, in June. 



616. Bank Swallow, Clivicola riparia. Eggs, 4 to 6, oval, 

 white; .45 -f- -70 to .47 -|- .72. Nests placed in burrows dug 

 by the birds, in banks of earth, composed of straw. Breeds 

 throughout the Northern Hemisphere ; in America, in all but 

 the extreme southern portion, in June. 



617. Rough-winged Swallow, Stelgidopteryx serripennis. 

 Eggs, 4 to 6, oval, white ; .50 + -(59 to .53 + -78. Nests com- 

 posed of straw, weeds, or feathers, and placed in holes of 

 banks, — the deserted nest of a kingfisher being often used, 

 the birds rarely excavating for themselves, — or in crevices in 

 bridges in building, etc. Breeds throughout the United States, 

 in the Eastern States north to Connecticut, in June. 



