Bui. 261, U. S. Dept. of Agriculture. 



Plate II. 



The American Plum Borer. 



a, Adult, about twice natural size; 5, winter cocoon opened to show larva, enlarged about one- 

 half; e, mass of winter cocoons embedded in frass and silk under scale of cherry bark; d, 

 characteristic resting posture of adult; e, eggs, about natural size; /, cocoon opened to expose 

 pupa, about twice natural size. (Original.) 



