Cynipid Galls 



1 Gall on oak, of Andricus cicatriculus Bass. (After Thompson) 



2 Gall on oak, of Andricus flocci Walsh. (After Thompson) 



3 Leafy oak gall, Andricus foliatus Ashm. (After Weld) 



4 Oak wool gall, Andricus lana Fitch. (After Thompson) 



5 Gall on oak, of Andricus ostensackeni Bass. (After Thompson) 



6 Gall on oak, of Andricus piperoides Bass. (After Thompson) 



7 Gall on oak, of Andricus perditor Bass. (After Thompson) 



8 Galls on oak, of Andricus ventricosus Bass. Single gall and 



a typical cluster. (After Stebbins) 



9 Homed oak gall, Andricus cornigerus O. S. on pin oak, Q. 



palustris 



244 



