KEY TO AMERICAN INSECT GALLS 



117 



ELB e u?enm u Her 



Fig. III. Oak apples. 1-3. Acorn plum gall, Amphibol.ips prunus Walsh. 4,5. A. 

 gainesi Bass. 6, 7. A. fuliginosa Ashm. 8, 9. A. i; r i z o n a t a Ashm. 10,11. 

 Palmer's oak apple, A. p a 1 m e r i Bass. (After Beutm., Am. Mus- Nat. Hist.) 



