lo INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



nearly 2 in. in length and i in. in diameter. On roots of black raspberry {Rubus 

 occidentalis) . Common. 



13. Cinquefoil Axil Gall {Diastrophiis potentilla Bass.). — Spherical or oblong, 

 about ^ to i in. in diameter, containing a single cell. Green in summer; brown 

 and spongy in winter. On axils of leaves of cinquefoil (Poientilla canadensis). 

 Common. 



14. Oak or May Apple {Amphibolips confluentus Harr.).— Large, globular, 

 more or less smooth outside and filled with a spongy substance, in the center of 

 which is a hard woody kernel containing the larval cell. From i to 2 in. in 

 diameter. When fresh, it is pale green, soft and succulent, with the contents 

 whitish. Later in the season the shell becomes brown, hard and brittle, with 

 the kernel woody and the spongy substance dark brown, but remaining soft. 

 Confined to the leaves of the trees belonging to the red oak group. Common. 



