88 



NEW YORK STATE MUSEUM 



Velvety red erineum on the under side of the leaf, the younger portions greenish, 

 on Q. V e 1 u t i n a . Chad. '08, p. 143 



Acarid. Eriophyes sp. 

 A snuff-brown erineum in large patches on the under side of the leaf of Q. 

 nana. Chad. '08, p. 142 



Acarid. Eriophyes sp. 

 An ashen erineum in the angles of the veins and spreading along them, mostly 

 on the under side of the leaves, on Q. palustris, Q. texana, 

 Q. velutina. Chad. '08, p. 152 



Acarid. Eriophyes sp. 

 Larvae on a grayish green erineum, onQ. utahensis 



Itonid. Cecidomyia sp. 



Fig. 86. Succulent oak gall, Dryophanta 

 palustris O. S. One gall in secti jn showing 

 loose cell. (Original) 



(2) Blister above lamina, woolly gall beneath 

 Globose leaf gall, smooth above, thickly covered with white wool below, single 

 or confluent, diameter 1.5 to 3.5 mm, on Q. alba and Q. platanoides. 

 Beutm. 'loc, p. 123 



Cynipid. Oak flake gall, Neuroterus floccosus Bass. 



(3) Rounded gall with several cells imbedded in the lamina of the leaf 

 Small, slightly flattened, green leaf gall projecting from both surfaces, hollow, 

 containing two or three oblong, filament-suspended cells, diameter about 3 

 mm, on Q. alba. Fig. 83, pi. 2, fig. 3. Osten Sacken '61, p. 63 



Cynipid. Oak wart gall, Andricus futilis Bass. 

 Round, flattened leaf gall projecting on both surfaces, red above, yellowish 

 below, diameter about 3 mm, on Q. c o c c i n e a , Q. p r i n u s . PI. 2, 

 fig. 6. Osten Sacken '61, p. 64 



Cynipid. Oak nipple gall, Andricus papillatus O. S. 

 Small, irregular, hard swellings on both sides of the leaf and concolorous, diameter 

 4 mm, on Q. rubra. Osten Sacken '61, p. 66 



Cynipid. Callirhytis modestus O 3. 



