KKV TO AMERICAN INSF.CT GALLS 



29 



Orchidaceae 



Cattlcya 



Irregular root iiidU. Felt '151, p. H9 



Itonid C )rehid root gall, P a r a 1 1 e 1 u d i p 1 o s i s c a 1 1 e y a e 



Moll. 

 Subspherical or sulx-onical pseudobulbs. Fig. 25. Fdt '15!, p. H9 



Hyni. Orchid Isosoma, I s o s o m a o r c h i d e a urn Westw. 



Salicaceae (willows and poj^lars) 

 Salix (willow) 

 Key to willow galls 

 Fruit galls, p. 29 

 Bud galls, p. 29 

 Rosette galls, p. 30 

 Leaf galls, p- 32 



Leaf rolls or folds, p. 32 

 Capsule or pocket galls, p. i2 

 Turgid leaf galls, p. 33 

 Twig galls, p. 34 



Fig. 26. Beaked willow gall, 

 Phytophaga rigidae 



O. S. Typical gall. (Author's 

 illustration) 



Fruit galls 



Enlarged seeds, reddish brown 



Fig. 27. Pine cone 

 gall, R h a b d o - 

 phaga strobi- 

 1 o i d e s Walsh. 



Typical gall. _ (Au- 

 thor's illustration) 



Itonid. C e c i d o m y i a sp. 



Bud galls 



Apical willow buds blasted. PI. 12, fig. 3 



Itonid. C e c i d o m y i a p. 

 Apical, fusiform, beaked gah, length 2 cm. Fig. 26, pl. 11, fig. 5. Felt '06a, 

 p. 112 



Itonid. Beaked willow gall, Phytophaga rigidae O. S. 



