PLATE XI. 



Galls caused by Andricus Inflator : a. Early spring condition, b. Late 

 spring condition, c. Slimmer condition. 1 and 2. Longitudinal sections 

 showing cylindrical cavity, arrow indicating the larval cell. 



A and B nearly nat. size, c half nat. size. 



Adlat-d 4- Son, Impr. 



