European elm case bearer, C o 1 c o p h o r a 1 i m o s i p e n n c 1 1 a Dup. 



1 Klin twig with leaves, showing the irregular rectangular mined areas 



2 Portion of leaf much enlarged, illustrating the character of the skele- 



tonizing and the circular hole thnnigh which the larva eats out the 

 tissues 



a 406 



