42 NEW YORK STATE MUSEUM 



Juglans nigra (black walnut) 



An erineum and blister on the leaf. Chad. '08, p. 135 



Acarid. Eriophyes tristriatus Nal. 

 A green warty, pocket gall on either surface, chiefly the upper, diameter 2 to 

 5 mm. Chad. '08, p. 136 



Acarid. Eriophyes sp. 



Carya (hickory) 



Key to hickory galls 



Occurring under the bark, p. 42 



Leaves rolled or folded, p. 42 



Axillary vein galls, p. 42 



Leaf blisters, p. 42 



Cylindric leaf galls, p. 42 



Conical leaf galls, -r-ithout a distinct orifice, p. 43 



Conical or globose leaf galls with distinct orifice and containing aphids, p. 43 



Globose leaf galls (other than those described above), smooth, or nearly so, p. 46 



Globose leaf galls — hairy, p. 46 



Midrib or vein gall, p. 47 



Leaf folds and ridges, p. 47 



Petiole or twig galls, p. 47 



Occurring on leaf, producing no gall, p. 47 



Swellings in husks, p. 49 



Occurring under bark 



Under dying, sappy bark. 



Itonid. Cecidomyia sp. 



Under decaying bark. Felt '13m, p. 205 



Itonid. M i a s t o r a m e r i c a n a Felt 



Leaves rolled or folded 



Leaf edges narrowly inrolled, especially toward the base, on C. pecan (pos- 

 sibly the same species has been recorded by Thompson from Massachusetts). 

 PI. 15, fig. 4. Chad. '08, p. 152 



Acarid. Eriophyes sp. 



" Deformation and folds on the leaf," on C. alba. Chad. '08, p. 135 



Acarid. Eriophyes sp. 



Axillary vein galls 



Small, axillary galls in the angles of the lateral veins. Wells '15, p. 43 



Acarid. Eriophyes sp. 



Leaf blisters 



Irregular, dull greenish or black-margined, slightly nippled, diameter 3 mm. 



PI. 5, fig. 8. 



Itonid. Cecidomyia sp. 



Cylindric leaf galls 



Greenish or black, cylindric, length 4 to 5 mm, diameter i mm. Fig. 46. Felt 

 'oge, p. 293 



Itonid. Hickory tube gall, Caryomyia tubicola O. S. 



Similar to preceding but longer, curved and tapering, length 5 to 7 mm, diameter 



1.4 mm, light green basally, dark brown or black apically. Wells '15, p. 53 



Itonid. Cecidomyia sp. 

 Slender, tapering, suberect, light greenish with flaring, dentate base, length 5 

 to 8 mm, basal diameter 2.5 to 3.5 mm. Wells '15, p. 47 



Itonid. Cecidomyia sp. 



