INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



25. White Oak Club Gall {Andriciis clavitla Bass.). — Club-shaped, hard and 

 woody, with a few leaves growing from it. Length i to i in. Green in summer; 

 brown in winter. On tips of twigs of white oak {Querciis alba). Very common. 



26. Succulent Oak Gall {Andricus palustris Osten Sacken). — Globular,, 

 green, succulent. Hollow inside, with a small seed-like kernel which rolls 

 about freely. Diameter abotit h in. On buds and young lca\-es of pin oak 

 {Quercus palustris). May. 



27. Small Oak Apple {Andricus sitigularis Bass.). — Globular, smooth,. 



lOI 



