PLATE XXIX 



Figs. I and 3. — Sections of an apple root, showing burrows of the apple root borer 

 {Agrilus villalicollis). About natural size. Original. 



Fig. 2. — Cross section of the trunk of a young apple tree, showing biurrows made by 

 the larvae of the apple root borer in ascending the trunk to pupate. Natural size. 

 Original. 



(186) 



