UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 21, No. 4, pp. 75-224, plates 4-7, 30 figures in text September II, 1920 



REVISION OF THE AVIAN GENUS PASSERELLA 



WITH SPECIAL REFERENCE TO THE 



DISTRIBUTION AND MIGRATION 



OF THE RACES IN CALIFORNIA 



BY 

 H. S. SWARTH 



SEP 24 1920 j 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



