164 NEW YORK STATE MUSEUM 



A white or whitish erineum in patches on the under side of the leaf. Chadwick 

 '08, p. 121 



Acarid. Eriophyes sp. 

 A rusty or brown erineum on the under leaf surface, forming patches along the 

 veins. Chadwick '08, p. 122 



Acarid. Eriophyes sp. 



Acer platanoides (Norway maple) 



Epidermal, hairy growths in vein axils, on the under leaf surface. Hodgk. '13, 



P- 423 



Acarid. Phyllocoptes magnificus Hodgk. 



A cer leucoderme (white-barked maple) 

 Slender, fusiform leaf galls, length 5 mm, sometimes very abundant on the 

 upper surface, also on sugar maple and soft maple. Felt '06b, p. 630 



Acarid. Maple spindle gall, Phyllocoptes aceris-crumena 



Riley 

 An erineum in scattered patches, mostly on the under surface of the leaf and 

 slightly dimpled. Chadwick '08, p. 152 



Acarid. Eriophyes sp. 



Acer spicatum (mountain maple) 



Whitish erineum on the upper leaf surface. Hodgk. '13, p. 422 



Acarid. Eriophyes parallelus Hodgk. 



Acer glabnini (dwarf maple) 



A purple erineum in large patches at the tips of the lobes and on the upper side 

 of the leaf, sometimes sprinkled over the under side. Chadwick '08, p. 119 



Acarid. Eriophyes sp. 



Acer species (maple) 



Rolled leaf margin, the edges yellow, the center crimson. Felt 'iij, p. 452 



Itonid. Cecidomyia sp. 

 A black, velvety erineum in large, irregular patches on the leaf. Chadwick '08, 

 p. 123 



Acarid. Eriophyes sp. 



Acer negundo (box elder) 

 Terminal bud galls with a diameter of i to 2 cm or greatly swollen, deformed 

 leaflets, the thickened midrib forming a mass 3 cm long and 7 mm in diameter, 

 the blade being almost aborted. Gill. '90a, p. 392 



Acarid. Box elder bud gall, Cecidomyia negundinis Gill. 

 Variable, subglobose leaf gall, diameter about 2 mm. Felt 'o8e, p. 394 



Itonid. Box elder leaf gall, Contarinia negundifolia Felt 

 A white erineum or shallow dimple on the under side of the leaf, sometimes 

 involving entire leaves of young or basal shoots, Chadwick '08, p. 119 



Acarid. Eriophyes sp. 



