296 The Ohio Naturalist. [Vol. XIV, No. 6, 



32. Gar MAN, H. The Phytoptus and other injurious Plant 



Mites. Trans. Dep't Agr. 111. n. s. Vol. 12: 123-143, '82. 



33. Hagen, H. a. The collection of Phytoptocecidia or mite 



galls in the Cambridge museum. Can. Ent. Vol. 17: 21-29. 

 '85. 



34. Hunter, W. D. The Aphidida; of N. America. Iowa Agr. 



Coll. Ex. Sta. Bull. 60, 1901. 



35. Jarvis, T. D. a Catalog of the Gall Insects of Ontario. 



39th Ann. Rep't Ent. Soc. Ont. pp. 70-98. '08. 



36. Shimer, H. a summer's study of the Hickory Galls with 



descriptions of supposed new insects bred therefrom. 

 Trans. Amer. Ent. Soc. Vol. 2: 386-398, '69. 



37. Stebbins, Fannie A. Insect Galls of Springfield, Mass. 



and vicinity. Bull. 2 Springfield, Mass. Mus. 1910. 



38. Walsh, B. D. On the insects, coleopterous, hymenopterous 



and dipterous inhabiting the galls of certain species of 



willow. Proc. Ent. Soc. Phil. Vol. 3: 543-644, vol. 6: 

 223-288. '64-'67. 



39. Walsh, B. D. On Genera of Aphidaj found in the U. S. 



Proc. Ent. Soc. Phil. Vol. 1: 294-311. '62. 



EXPLANATION OF PLATES. 

 PLATE XII. 

 Acer saccharum. Vein gall. x4. 



Amelanchier canadensis. Leaf with galls, xl. Single gall. x5. 

 Amelcanchier canadensis. Leaf with galls, xl. Single gall in 



section slightly enlarged. 

 Betula lenta. Vein gall. x^. 

 Carya ovata. Leaf gall. x%. 

 Castanea dentata. Aphid leaf gall. x}4- 

 Clematis virginiana. Bud gall. xl. 

 Decodon verticillatus. Bud gall. xl. 



Dulichium arundinaceum. Opened spikelet showing galled 

 rachilla. 



Fig. 10. Dulichium arundinaceum. Normal spikelet. 

 Fig. 10a. Dulichium arundinaceum. Galled spikelet. See Fig. 9. 

 Fig. 13. Mikania scandens. Stem gall. xl. 

 Fig. 15. Myrica asplenifolium. Mite leaf gall. x3^. 

 Fig. 18. Salix sericca. Leaf gall. x3^. 



PLATE XIII. 



Fig. 11. Hamamelis virginiana. Leaf with vein galls, xj^. 



Fig. 11a. Hamamelis virginiana Vein gall from upper side. x^^. 



Fig. 12. Juncus canadensis. Bud and stem galls. x}/2- 



Fig. 14. Muhlenbergia mexicana. Bud and stem gall. x}-^. 



Fig. 16. Ostrya virginiana. Leaf with galls, xg. 



Fig. 17. Rhus copallina. Galled leaflets, xl. 



Fig. 19. vSolidago odora. Terminal bud gall. x}4- 



Fig. 19a. Solidago odora. Long. med. section of 19. x3^. 



Fig. 20. Spirea latifolia. Bud gall. x'^. 



Fig. 21. Tilia americana. Petiole gall. xf. 



Fig. 22. Vitis aestivalis. Leaf gall. xl. 



