296 
The Ohio Naturalist. 
[Vol. XIV, No. 6, 
32. Garman, H. The Phytoptus and other injurious Plant 
Mites. Trans. Dep’t Agr. Ill. n. s. Vol. 12: 123-143, ’82. 
33. Hagen, H. A. The collection of Phytoptocccidia or mite 
galls in the Cambridge museum. Can. Ent. Vol. 17: 21-29. 
’85. 
34. Hunter, W. D. The Aphich'cke of N. America. Iowa Agr. 
Coll. Ex. Sta. Bull. GO, 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. Siiimer, 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 Aphidae found in the U. S. 
Proc. Ent. Soc. Phil. Vol. 1: 294-311. ’62. 
EXPLANATION OF PLATES. 
PLATE XII. 
Fig. 1. Acer saccharum. Vein gall. x4. 
Fig. 2. Amelanchier canadensis. Leaf with galls, xl. Single gall. x5. 
Fig. 3. Amelcanchier canadensis. Leaf with galls, xl. Single gall in 
section slightly enlarged. 
Fig. 4. Betula lenta. Vein gall, x%. 
Fig. 5. Carya ovata. Leaf gall. x%. 
Fig. 6. Castanea dentata. Aphid ieaf gall. xpb 
Fig. 7. Clematis virginiana. Bud gall. xl. 
Fig. 8. Decodon verticillatus. Bud gall. xl. 
Fig. 9. 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. xj£. 
Fig. 18. Salix sericea. Leaf gall. xj^. 
PLATE XIII. 
Fig. 11. Hamamelis virginiana. Leaf with vein galls. xJJ- 
Fig. 11a. Hamamelis virginiana Vein gall from upper side. x%. 
Fig. 12. Juncus canadensis. Bud and stem galls. xb£. 
Fig. 14. Muhlenbergia mexicana. Bud and stem gall. xj£. 
Fig. 16. Ostrya virginiana. Leaf with galls, xp 
Fig. 17. Rhus copallina. Galled leaflets, xl. 
Fig. 19. Solidago odora. Terminal bud gall. xJJ- 
Fig. 19a. Solidago odora. Long. med. section of 19. xpC 
Fig. 20. Spirea latifolia. Bud gall. x§. 
Fig. 21. Tilia americana. Petiole gall. x|. 
Fig. 22. Vitis aestivalis. Leaf gall. xl. 
