KRY TO AMERICAN INSECT GALLS 1 63 



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

 upper surface, also on sugar maple and white-barked maple. Felt '06b, 

 p. 630 



Acarid. Maple spindle gall, Phyllocoptes aceris-crumena 



Riley 

 Small, bladderlike greenish or reddish leaf galls, diameter 2.5 mm, very abun- 

 dant, on the upper surface. Fig. 169, pi. 16, fig. 9. Felt '06b, p. 630 



Acarid. Maple bladder gall, Phyllocoptes quadripes Shim. 

 Associated with the preceding. Hodgk. '13, p. 421 



Acarid. Eriophyes confusus Hodgk. 

 A pale yellow to deep brown erineum on the under side of the leaf. Chadwick 

 '08, p. 121 



Acarid. Eriophyes sp. 



Acer saccharum (sugar or rock maple) 



Thickened vein galls, green to brownish, length 3 to 5 mm. Fig. 170. Felt 

 'i5e, p. 181 



Itonid. ? D a s y n e u r a communis Felt 



Fig. 170. Gouty vein midge, D a s y- 

 *neura communis Felt. Gall pre- 

 sumably of this species on sugar maple, 

 one gall closed, the others open. (Origina.) 



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



upper surface, also on soft maple and white-barked maple. Felt '06b, p. 630 



Acarid. Maple spindle gall, Phyllocoptes aceris-crumena 



Riley 

 Red erineum on the upper leaf surface. Hodgk. '13, p. 421, 422, 423 and 424 

 ^ Acarid. Eriophyes elongatus Hodgk. 



Eriophyes maculatus Hodgk. 

 Eriophyes regulus Hodgk. 

 Phyllocoptes constrictus Hodgk. 

 Phyllocoptes variabilis Hodgk. 

 Greenish erineum on the under leaf surface. Hodgk. '13, p. 421 



Acarid. Eriophyes modest us Hodgk. 

 6 



