PLATE 5. 



Fig. 17. Eriophyes dentatae, chestnut. 



— 18. Cecidomyia? castaneae, chestnut. 



— 10-20. Sections of Amphibolips tinctoriae, scarlet oak. 1.9 X 



— 21. Section of Cynips'f obovata, scarlet oak. 1.9 X 

 22. Section of Cynipsf aspera, scrub oak. 1.9 X 



— 23. Amphibolips nubilipennis, black oak. 



(7-1) 



