92 EGGS OF NORTH AMERICAN BIRDS. 



4S6a. Northern Raven, Corviis corax principalis. Eggs,. 

 4 or 5, oval or rounded oval, dark green, spotted and blotclied 

 irregularly with grayish and black; 1.35 -[- 1.70 to 1.45 -[- 

 1.80. Nests composed of sticks, lined with coarse grass and 

 sea-weed, usually placed on cliffs, but occasionally on trees. 

 Breeds thi-oughout the northern portion of the continent of 

 North America, from British America, and southwest ; but 

 local east of the Mississippi River, Maine, mountains of New 

 Hampshire and Vermont and Western Massachusetts, North- 

 ern New York and the mountains southward through Penn- 

 sylvania and Virginia ; nesting to the southward in February, 

 and in New England and northward in March and April. 



487, White-necked Raven, Corvics cryptoleucus. Eggs, 

 4 or 5, oval, varying from pale grayish to deep green, spotted 

 and blotched with purplish and brown ; 1.25 -{- 1.75 to 1.50 ~|- 

 1.80. Nests composed of sticks, lined with weeds and grass, 

 and placed on cliffs. Breeds in the southern border of the 

 United States, from Texas to Southern California north to 

 Colorado and south into Mexico, in June. 



488. American Crow, (Jorvus americanus. (Type, Plate 

 VII.) Eggs, 3 to 5, oval to rounded oval, varying from pale 

 bluish green to deep green, spotted and blotched, finely or 

 coarsely, witli purplish brown, lilac, and black ; 1.08 -f- 1-55 

 to 1.20 -|- 1.60. Nests composed of sticks, lined with strips of 

 bark, grass, hair, etc. Breeds throughout North America, 

 from the fur countries to Mexico, excepting Florida, in the 

 South in April, in the middle districts in May, and in the ex- 

 treme North in June. 



488a. Florida Crow, Corvus americanus floridanus. Eggs, 

 indistinguishable from those of No. 488. Breeds in Florida, 

 in April. 



4886. California Crow, Cormis americana heperis. Eggs, 

 similar to those of No. 488. Breeds in Western United States, 

 north to Washington Territory, Idaho, and Montana, south to 

 New Mexico, and east to the Rocky Mountains. See Ridg- 

 way, in "Manual of North American Birds." 



