Vol. XV 



DKCETvlKER 23, 1918 



-No. 12 



CONTENTS 



,'a2'5 



Parasitism, Morphology, and Cytology of Cronartituxt 



ribicolk - - - _ « - . - - 619 



REGINALD H. COLLEY 



( Contribution trom Buteau ol Plant Industry ) 



Furtliur Data on the Susceptibility of Rutaceous Plants to 



Citrus-Canker - - - - - - - - 661 



H. ATHERTON LEE 



(Contribution frqni Bureau of Plant Industry) 



PUBUSHED BY ACTHORTTY OF THE SECRETARY OF AGRICCITDRE. 



WITH THE COOPERATION OF THE ASSOaATIOPf OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASMINOXON, r>. c. 



WASHINQTON : aOVERNMCNT PRIHTim OfTKt 



