82 CALIFORNIA ACADEMY OF SCIENCES. 



Haywards. W. 0. Emerson. January 25, 1885, ten 

 or more have been about town off and on for a week. 



Contra Costa County. W. E. Bryant. Rare summer 

 resident. 



Ridgway. First noticed in the early part of July, 

 1868, on the Toyabe Mountains near Austin a single 

 bird only. At the Ruby Mountains a little later in the 

 same month we found it extremely numerous about 

 the high limestone cliffs. At this place they literally 

 swarmed. 



Hoffman. Rather common in the more elevated 

 regions, building in and about the fissures and projec- 

 tions of cliffs; was noticed again in the upper portion of 

 the Black Canon of the Colorado valley in September. 



90. Trochilus alexandri Bourc. & Muls. BLACK-CHINNED 

 HUMMINGBIRD. 



San Diego. L. B. Rare migrant; perhaps breeding; 

 if so overlooked. 



Poway. F. E. Blaisdell. Common summer resident; 

 began to breed in April. 



Poway. W. 0. Emerson. April 21, 1884, young. 



San Bernardino. F. Stephens. Common; breeds in 

 the valleys. 



Agua Caliente, San Diego County, F. Stephens. 

 Ten specimens seen from March 19 to April 13, 1886. 



Henshaw, 1876. Not found by our party very com- 

 mon in any portion of California. 



Cooper, 1870. Mojave River, June 3, breeding; 

 several nests near Santa Barbara in April and early in 

 May. 



Central California. L. B. Apparently rare or local, 

 in summer only, seen occasionally in the Sierra at vary- 

 ing heights, usually in August and September, common 

 in breeding season along the San Joaquin and Sacra- 



