ENGLISH: ILLINOIS TREES: THEIR INSECT ENEMIES 



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Fie. 30.— Lilac borer: A, damage to lilac branch; B, adult, a clear- 

 winged moth, on twig with frass at exit holes; C, larva in lilac branch Across 

 section). (Photographs A and B from Connecticut Agricultural Experi- 

 ment Station.) 



