INSECT-GALLS OF THE VICINITY OF NEW YORK CITY 



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

 white oak (Qncrcns alba). August and September. Common. 



68. Oak Fold Gall (Cccidomyia 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 Loew). — 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. 



