44 CALIFORNIA ACADEMY OF SCIENCES. 



Henshaw, 1876. (Var. richardsonii). It is found in 

 southern California, and I think not uncommonly, though 

 I took but a single specimen (August 28, at Walkers 

 Basin). 



Cooper, 1870. I shot a fine specimen at Fort Mojave, 

 in winter 



San Bernardino. F. Stephens. Rare resident of val- 

 ley and foothills. 



Agua Caliente, San Diego County, Cal. F. Stephens. 

 One seen April 6 and another April 8, 1886. 



San Diego. L. B. Winter, rare. 



40. Falco columbarius suckleyi Ridgw. BLACK MER- 



LIN. 



41. Falco richardsonii Ridgw. RICHARDSON'S MERLIN. 

 [The notes on the Pigeon Hawk were arranged prior 



to the receipt of the A. 0. U. Check List, and at the time 

 I did not know how the different forms would be treated. 

 Having thus far recognized but one form in the few 

 specimens I have collected, I simply follow what I be- 

 lieve to be competent authority.] 



42. Falco sparverius Linn. AMERICAN SPARROW HAWK. 

 San Diego and north Lower California; tolerably com- 

 mon resident. L. B. 



Volcan Mountains. W. 0. Emerson. March 9, first 

 noticed; Santa Isabel, April 3, in pairs. 



San Bernardino. F. Stephens. Tolerably common 

 resident in the valley and foothills. 



Agua Caliente. F. Stephens. Several seen; probably 

 resident in small numbers. 



Henshaw, 1876. In California, as throughout the 

 west generally, very numerous. Great numbers of these 

 birds near Santa Barbara in July. 



