KEY TO AMERICAN INSECT GALLS 



85 



EL.B eutenmu Mer 



Fig. 84. I, 2. Oak fig gall, Biorhiza forticornis Walsh on dwarf chestnut oak. 3, 4- 

 B. m e 1 1 e a Ashm. 5. Xystoteras volutellae Ashm. 6. Bell-shaped oak gall, Zophero- 

 teras vaccinii Ashm. (After Beutm., Am. Mus. Nat. Hist.) 



