KEY TO AMERICAN INSECT GALLS 



Fig. III. Oak apples. 1-3. Acorn plum gall, A m'p'h i b o U p s prunus Walsh. _"4, 5. A. 

 a i n e s i Bass. 6, 7. A. f u 1 i g i n o s a Ashm. 8, 9. A. t r i z o n a t a Ashm. 10, 11. 

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



