MEMOIR 109 JULY, 1927 



CORNELL UNIVERSITY 

 AGRICULTURAL EXPERIMENT STATION 



STUDIES OF THE LIFE HISTORY 



OF UST1LAGO AVENAE (PERS.) JENSEN 



AND OF USTILAGO LEVIS (KELL. & SWING.) MAGN. 



GEORGE RAYMOND GAGE 



ITHACA, NEW YORK 



PUBLISHED BY THE UNIVERSITY 



Received for publication November 24, 1926 



