INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



shaped. Pale red to light lavender. In clusters on under surface of leaf of 

 white oak {Qucrcus alba). August and September. Common. 



68. Oak Fold Gall (Cecidomyia niveipila Osten Sacken). — Consists of a 

 large fold lined with white pubescence. Sometimes the entire leaf is folded 

 with the edges curled, the under side of the leaf being inside of the gall. On red 

 oak {Quercus rubra). May and June. Common. 



69. Goldenrod Bunch Gall {Cecidomyia solidaginis Locw). — Produced by 

 the arrest of the stalk, which causes the leaves to accumulate, thus forming a 

 globular bunch, consisting of several hundred leaves. On goldenrod (Solidago) 

 Very common. 



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