280 CALIFORNIA ACADEMY OF SCIENCES. 



small embryo. The contents of the fresh one I ate, after 

 frying it with a bit of tallow. It tasted somewhat like the 

 eggs of sea-birds. One of the eggs is white, the other, pale 

 greenish white, they measure 57x46; 57x45 millimetres. 



121. Buteo borealis calurus (Cass.) 



Westeen Ked-tail. — Collected at the Cape region by Mr. 

 Belding, where he found it common. Mr. Anthony says it 

 is common on the peninsula north of El Bosario. In Jan- 

 uary and February, 1888, I saw them sailing above Santa 

 Margarita Island. At Ubi, May 9, 1889, I saw two birds; 

 others were seen at San Fernando. Two specimens collected 

 on the peninsula are rather pale in color, and each has a 

 narrow subterminal black band on the tail, consequently 

 cannot be referred to B. h. lucasanus. 



122. Buteo borealis lucasanus Ridgw. 

 St. Lucas Eed-tail. 



123. Buteo lineatus elegans (Cass.) 



Eed-bellied Hawk. — Mr. Belding found a pair nesting at 

 San Rafael. Mr. Anthony has sent me the following re- 

 garding the species: ''Rather common along the coast 

 and in the first ranges of low hills from Ensenada to El 

 Rosario. A nest found near San Quintin, in May, contained 

 three eggs well incubated. The nest was about 12 feet 

 from the ground, in a sumac, rather compactly built of 

 twigs and sticks, and lined with dry leaves. Not seen 

 above 2,500 feet." 



124. Buteo abbreviatus Caban. 



Zone-tailed Hawk. — At the Cape region it has been noted 

 only by Mr. Belding, who says it is very rare. Mr. Anthony 

 found a pair nesting, April 24, in tlie top of a tall pine on 

 San Pedro Martir, at 7,500 feet elevation. 



125. Buteo swainsoni Bonap. 



Swainson's Hawk. — Mr. Anthony says it is common from 

 the coast to 4,500 feet altitude, and nests wherever trees 



