Gall. Length 2 to 4 mm, shining and often reddish. It is a fleshy fold near the mid vein, frequently producing curling or even recurving of the leaf. (Plate 9, figure 3.) One or more larvae inhabit the deformity
”- EP Felt: (1914) 68th report of the State Entomologist on injurious and other insects of the State of New York©