KEY TO AMERICAN INSECT GAELS 



93 



ELB eufenmuMer 



Fig. 89. Philonix galls, i. Oak pea gall. P. pezomachoides O. S. 2-4. Oak hedgehog gall. 

 f. erinacei Beutm. 5. Yellow sea urchin, P. echini Ashm. 6. 7. Spiny oak gall. P. 

 prinoides Beutm. 8, g- Hairy oak gall. P. villosa Gill. 10. P. hirta Bass. 11. Jewel oak 

 gall, P. macrocarpae Bass. 12,13. P. niger Gill. (After Beutm., Am. Mus. Nat. Hist.) 



