UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 7, No. 1, pp. 1-8 May 26, 1910 



TWO NEW OWLS FROM ARIZONA 



WITH DESCRIPTION OF THE JUVENAL 



PLUMAGE OF STRIX OCCIDENTALIS 



OCCIDENTALIS (XANTUS) 



BY 



HARRY S. SWARTH 



BERKELEY 

 THE UNIVERSITY PRESS 



