Plate F. 



1. Ball Gall on Hickory. {Diplos'is caryae.) 4. Kose Stem Gall. {Rliodites globuhts.) 



2. Spiny Ball Gall on Wild Rose. (i2/iO(?i7fs ne6u^osus.) 5. Ash Gall. Cecidomyiapellex.) 



3. Ball Gall on Wood Nettle. (Cecidoviijia urnicola.) 6. Eye Spot Gall of Maple. {Cecidomi/in 



ocellata. ) 



