INSECTS AFFECTING PARK AND WOODLAND TREES 619 



Small globular galls on scrub and post oak 



Oak k-at bullet gall, Dryophanta polita, p. 626 



Irregular, reddish or greenish galls in clusters on leaves and stems of white and s<;rub 

 ^^^^ Oak fig gall, Biorhiza 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 ci d o m y i a p 11 u 1 a e, p. 627 



Rounded, oblong or oval galls with numerous long si>nies 



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



A globular, spiny gall on dwarf chestnut oak 



Spinv oak gall, C y n i p s ]> r i n o i d e s, \>. 627 



Clusters of seedlike bodies on red oak. . . . Oak leaf seed gall, C y nips ,1 e , i ,1 « a, p. 627 

 Small, brown, buttonlike galls.. Oak button gall, Xeuroterus u m b 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 v 11 b e s c e n s, p . 627 

 6'<//A i>n catl'iiis or fniit 



Shotlike, 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 j) r u n u s, p. 628 



Affecting hickory 

 Galls on twigs 

 Green or black irregular galls on leaf stem or twigs 



Hickory gall aphid, Phylloxera c a r y a e c a u 1 i s , p. 33 i 

 Galls on haves 

 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. 62.S 



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

 Subglobular, pubescent, onion-shaped gall 



Hickory onion gall, C e c i d o m y i a h o 1 o t r i c h a, j). 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, P h y 1 1 o x e r a f o v e o 1 a, p. 629 



Affecting maple 



Red, yellow-ringed galls in red maple leaves 



Ocellate maple leaf gall, C e c i d o m y i a o c e 1 1 a r i s, p. 629 



Slender, fusiform galls on upper surface of sugar maple leaves 



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



