2 2 INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



43. Oak Flake Gall (Xenroterus ftoccosus Bass.). — Small, hemispherical, 

 covered with white hairs. Foimd in numbers on the under side of leaf of 

 swamp white oak {Quercus platanoides) . On the upper side of the leaf it is 

 indicated by a small, smooth, shining blister-like elevation. Common. 



44. Oak Button Gall (X'curoicriis umhilicatus Bass.). — Small, rounded, 

 much depressed, with a rather deep cavity on top, in the center of which is a 

 minute nipple. About t'j in. in diameter. Foimd in numbers on the under 

 side of leaf of swamp white oak {Quercus platanoides). On the upper side of 

 the leaf it is indicated by a circular spot. Common . 



45. Huckleberry Gall {Solcnozopheria vaccinii Ashm.). — Rounded, elon- 

 gate, concave at place of attachment to the stem, turning the same downward. 

 Green and pithy in summer; brown, hard and woody in winter. On stems of 

 huckleberry. Common. 



