INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 21 



40. Oak Flower-Stem Gall {Ncurotcrus pallidiis Bass.)- — Small, unevenly 

 globular, smooth and of a tine, soft cellular consistence. Pale wood color. In 

 masses on flower stems of swamp white oak {Qitcrciis platanoidcs) . Not 

 common. 



41. Oak Potato Gall (Neiiroterus batatus Fitch). — Generally large and un- 

 even, often resembling a potato in shape. Hard and woody, the surface being 

 coated with a pale bluish bloom. Inside it is dense, corky, with many larval 

 cells. On white oak (Quercus alba) below the terminal shoot. Common. 



42. Noxious Oak Gall {Neuroterus noxiosus Bass.). — Irregularly rounded, 

 hard and woody, with many larval cells inside. On the terminal twigs of swamp 

 white oak {Quercus platanoides). Common. 



