INSECTS AFFECTING PARK AND WOODLAND TREES 6I9 



Small globular galls on scrub and post oak 



Oak leaf bullet gall, Dryophanta polita, p. 626 

 Irregular, reddish or greenish galls in clusters on leaves and stems of while and scrub 



oaks Oak fig gall, B i o rh i z a f o r t i c o r n i s, p. 626 



Somewhat rounded, hard, woody, red, reticulate galls 



Warty oak leaf gall, C e c i d o m y i a j) i 1 u 1 a e, p. 627 

 Rounded, oblong or oval galls with numerous long spines 



Oak hedgehog gall, A c r a s p i s e r i n a c e i, p. 627 

 A globular, spiny gall on dwarf chestnut oak 



Spiny oak gall, C y n i p s j) r i n o i d e s, p. 627 

 Clusters of seedlike bodies on red oak. . . . Oak leaf seed gall, C y n i p s d e c i d u a, p. 627 

 Small, brown, buttonlike galls . . Oak button gall, N e u r o t e r u s u m h i 1 i c a t u s, p. 627 

 Marginal fold at base of leaf serration 



Marginal fold gall, C e c i d o m y i a e r u b e s c e n s, p . 627 

 Galls on catkins or fruit 



Shctlike, white catkin gall Oak flower gall, A n d r i c u s p u 1 c h r a , p. 627 



A globular gall growing from the side of acorn cups 



Oak plum gall, A m p h i b o 1 i p s p r u n u s, p. 6-28 



Affecting hickory 

 Galls on twigs 

 Green or black irregular galls on leaf stem or twigs 



Hickory gall aphid, P h y II o x e r a c a r y a e c a u 1 i s , p. 331 

 Galls on leaves 

 Smooth, green, onion-shaped galls with pointed tip 



Hickory seed gall, C e c i d o m y i a c a r y a e c o 1 a, p. 628 

 D i p 1 o s i s c a r y a e, p. 628 

 Subglobular, pubescent, onion-sliaped gall 



Hickory onion gall, C e c i d o m y i a h o 1 o t r i c h a, p. 628 

 Rounded, brownish, downy gall 



Hickory peach gall, C e c i d o m y i a p e r s i c o i d e s, p. 628 

 Narrow, cylindric, tubelike galls . . Hickory tube gall, C e c i d o m y i a t u b i c o 1 a, p. 628 

 Flattened, circular, yellow or whitish galls 



Hickory button gall. Phylloxera foveoia, p. 629 

 Affecting maple 



Red, yellow-ringed galls in red maple leaves 



Ocellate maple leaf gall, Cecidomyia ocellaris, p. 629 

 Slender, fusiform galls on upper surface of sugar maple leaves 



Fusiform maple gall, E r i o p h y e s a c e r i c o 1 a, p. 630 



