318 CALIFORNIA ACADEMY OF SCIENCES. 



306. Auriparus flaviceps (Suud.) 



Yerdin. — A common species throughonfc the peninsula, as 

 noted by all observers. Mr. Belding doubts if it occurs on 

 the peninsula north of lat. 32°, unless on the eastern side. 

 Nests were found sometimes in mesquite trees, but usually 

 in cliollas. At Comondu, in April, I found young large 

 enough to care for themselves, and nests containing fresh 

 eggs. 



307. Regulus calendula (Linn.) 



Ruby-crowned Kinglet. — Mr. Belding found it moderate- 

 ly common in the Victoria Mountains in February. On 

 San Pedro Martir Mr. Anthony saw it up to 11,000 feet al- 

 titude, and down to the coast in winter and spring. A few 

 were found in the pines the last of April, at 8,500 feet ele- 

 vation. 



308. Regulus obscurus Ridgw. 



Dusky Kinglet. — Known only from Guadalupe Island. 

 For notes of habits and description of nest and eggs, see 

 Bull. CaJ, Acad. Sci., Vol. 11, pp. 314-316. 



309. Polioptila caerulea (Linn.) 



Blue-gray Gnatcatcher. — Common at the Cape region, 

 and also found in the Victoria Mountains by Mr. Belding. 

 I obtained a single specimen at San Julio, near Comondu, 

 in March, 1888. 



310. Polioptila plumbea Baird. 



Plumbeous Gnatcatcher. — Collected at Cape St. Lucas 

 by Mr. Xantus. Mr. Belding has recorded it as very com- 

 mon at the Cape region. I found it on Santa Margarita Is- 

 land, and from the west coast to the Gulf in about lat. '2(J^ 

 N., and also near the west coast in lat. 28"^ N. 



311. Polioptila californica Brewst. 



Black-tailed Gnatcatcher. — This species (?'! was noted 

 by Mr. Belding from Santa Eosalia Bay. Mr. Anthony 

 says it breeds at San Fernando, and has been found by him 

 at 5,000 feet altitude. 



