EGGS OF NORTH AMERICAN BIRD8. 97 



trees. Breeds in the valley of the Lower Rio Grande, Texas, 

 and southward through Eastern and Southern Mexico, in May. 

 505(1. Arizona Hooded Oriole, Icterus cucullatus nelsoni. 

 Eggri, indistinguishable from those of No. 505, and the nests 

 and nesting habits are simihar. Breeds in Southern Arizona, 

 west to San Diego, and south to Mazatlan and Cape St. 

 Lucas, in May. 



506. Orchard Oriole, Icterus spurius. Eggs, 4 to 6, oval, 

 spotted, dotted, and sometimes lined with umber and lilac ; 

 .60 -j- .80 to .65 -f- .85. Nests open, but somewhat purse- 

 shaped, composed of fine, tough grasses woven firmly together 

 and placed in trees. Breeds throughout the United States, 

 west to the plains, excepting Florida and the Northern New 

 England States, in May and June. 



507. Baltimore Oriole, Icterus galhula. Eggs, 4 to 6, 

 oval, pale blue, spotted, dotted, and lined with umber, usually 

 more thickly on the larger end; .60 -}- .90 to .72 -{- 1.20. 

 Nests decidedly purse-shaped, composed of strips of fibrous 

 bark, horse-hair, strings, rags, or other available material, 

 woven firmly and neatly together. Breeds in Eastern LTnited 

 States, west nearly to the Rocky Mountains, north of Florida, 

 in June. 



508. Bullock's Oriole, Icterus huUochi. Eggs, indistin- 

 guishable from those of No. 507, and the nest and nesting 

 habits are similar. Breeds in Western United States, from 

 the eastern base of the Rocky Mountains west to the Pacific 

 coast, in June. 



509. Rusty Blackbird, Scolecophagus caroUmts. Eggs, 

 4 or 5, oval, varying from pale green to rufous brown, spotted, 

 dotted, and lined with reddish brown and umber, often so 

 thickly as to obscure the ground color; .71 -|- 1.00 to .75 -|- 

 1.05. Nests placed in bushes, composed of grass, weeds, and 

 mud, woven into a compact structure. Breeds in Eastern North 

 America, from Northern New England northward, in May. 



510. Brewer's Blackbird, Scolecophagus cyanocephalus. 

 (Type, Plate VIII.) Eggs, 4 to 7, indistinguishable from 



