INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



30. Oak Capsule Gall (Andricns capsiilits Bass.). — Oval and attached to a 

 pedicel, 2 to | in. long. Resembles the capsule of certain mosses. On the 

 margin of leaf of swamp white oak {Quercus platanoides) . Not common. 



3 1 . Oak Midrib Gall [A ndricns pigcr Bass. ) . — A large, irregular woody swell- 

 ing on the midrib of leaf of black oak {Quercus velutina), always on the vmder 

 side and usually on the lower half of the leaf. Upper side indicated by a 

 widening of the midrib and a slight depression of the leaf at that point. Rather 

 common. 



*4^fgpf 



32. Spiny Oak Gall {Cynips prinoidcs Beuten.). — Globular, covered with 

 nuinerous cone-like projections, hard and woody, with a small cell inside. 

 About h in. in diameter. Green, tinged with red. On upper side of leaf 

 of dwarf chestniat oak {Quercus prinoides). Not common. 



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