32 



iSTEW YORK STATE MtTSJEUM 



Small, clustered, rosette gall, length 2 cm. Fig. 29, 30. Felt '156, p. 94 



Itonid. Clustered willow gall, Rhabdophaga racemi Felt 



Leaf galls 

 Leaf rolls or folds 



Fusiform pod or curled leaves, length 10 mm. PI. 10, fig. 2. Felt '156, p. 169 

 Itonid. Willow-pod midge, Dasyneura salicifolia Felt 

 Closely rolled, terminal leaves. Felt '156, p. 93 



Itonid. Rhabdophaga plicata Felt 

 One or two narrow, longitudinal, yellowish green or brown upward folds opening 

 below, onS. longifolia. Chad. '08, p. 145 



Acarid. Eriophyes salicicola Garm. 

 Small thickenings or inroUings of the leaf margin, green, scattered or coalescent, 

 on S. alba. Chad. '06, p. 144 



Acarid. Eriophyes sp. 

 Irregular, more or less crenulate midrib fold, length 7 mm. Utah 



Acarid. Eriophyes sp. a2759 



Capsule or pocket galls 

 Very small, crimson red, pocket galls or semicapsules, onS. amygdaloides • 

 Chad. '08, p. 144 



Acarid. Eriophyes sp. 



Fig. 32. Willow pea gall, 

 Pontania pisum 



Walsh. (Original) 



Fig. 33. Willow apple gall, 

 Pontania pomum Walsh, 

 side view. (Original) 



Small, irregular, serrate, roughened, pocket galls or semicapsules, green or red, 

 usually on upper surface, on S. alba, balsamifera, discolor 

 and r o s t r a t a . PL 16, fig. 8. Chad. '08, p. 144 



Acarid. Eriophyes sp. 

 Purple or pale green capsule gall on both surfaces of the leaf, onS. cordata. 

 Chad. '08, p. 145 



Acarid. Eriophyes sp. 

 Irregularly hemispherical, greenish yellow, pocket gall on either surface, on S. 

 nigra. Chad. '08, p. 146 



Acarid. Eriophyes semen Walsh 

 Small and very crowded, pocket galls on leaves of S. nigra. Chad. '08, p. 146 



Acarid. Eriophyes sp. 

 Small, irregular, spherical galls on upper surface of leaves. Chad. '08, p. 146 



Acarid. Eriophyes sp. 



