EXCHANGE 



VOLUME THREE 



NUMBER FOUR 





DECEMBER 1911 



C n 1 1 11 1 s 



DR. ALBERT J. COOK 



CALIFORNIA STATE COMMISSIONER OF HORTICULTURE 



E3S1G. E. O 

 KUWANA. S. 1. 

 CRAWFORD. D. L. 

 BANKS N. 

 HALL. H V. M. 



Plant Lice of Citrus Tr»«» 



White Files o( Japan 



American Psyllldaa V 



Pseudoscorplons of California 



Studies In Acarlna II 



PUBLISHED QUARTERLY BY THE 



Dr^tartuunit nf Uiinlnaii nf ynmniia (Tnllryr 



A. J COOK. D. So.. Head Professor 

 CLAREMONT. CALIFORNIA. U. S. A. 



