58 JiGGS OF NORTH AMERICAN BIRDS. 



indistinguishable from those of No. 337. Breeds on the plains 

 of the United States, from Minnesota to Texas. 



3376. Westerjj Red-tail, JButeo borealis calurus. Eggs, 

 as a lule, indistinguishable from those of No. 337, bixt are 

 often quite finely spotted. Breeds throughout Western North 

 America, from the Rocky Mountains to the Pacific, south into 

 Mexico. 



337c\ Saint Lucas Red-tail, Suteo borealis lucasanus. 

 Eggs, probably indistinguishable from those of No. 337, but 

 are perhaps smaller. Breeds in the peninsula of Lower Cali- 

 fornia. 



338. Haklan's Hawk, £uieo harlani. Eggs, probably un- 

 described. Breeds in Texas and possibly in Kansas and 

 Pennsylvania. 



339. Red-siiouldered Hawk, Buteo lineatus. Eggs, 3 or 

 4, spherical or elliptical, bluish white, usually, but not always, 

 spotted and blotched irregularly with brown and umber of 

 varying shades ; 1.70 + 2.20 to 1.80 -|- 2.30. Breeds through- 

 out Eastern North America, west to Texas and the Plains, 

 south to the Gulf coast and Mexico, in April in the more 

 northern districts, earlier farther south. 



339a. Florida Red-shouldered Hawk, JButeo lineatus 

 alleni. Three eggs, as a rule, indistinguishable from those of 

 No. 339, but are seldom unspotted, and somewhat smaller. 

 Breeds in Florida, in February and March. 



3396. Red-bellied Hawk, JButeo lineatus elegans. Eggs, 

 indistinguishable from those of No. 339, but are, as a rule, 

 smaller. Breeds throughout Western United States, from 

 Western Texas to California, and south into Mexico. 



340. Zone-tailed Hawk, Buteo abbreviatus. Eggs, 2 to 

 4, spherical, yellowish white, spotted and blotched quite 

 coarsely with brown and umber of varying shades ; 1.70 -f- 2.15 

 to 1.72 -j- 2.19. Breeds in Texas, Arizona, and Southern Cali- 

 fornia, south to Northern South America, in May. 



341. White-tailed Hawk, Buteo albicaudatus. Eggs, 2 



