Cincticornia pustulata

This species was reared in some numbers in the latter part of April and early in May 1909 from oval, pustulate swellings on the leaves of the black oak Quercus velutina, taken in MA in October 1908. Apparently the same species was reared March 30 1896 from a similar leaf gall on red oak, Quercus rubra, taken at DC.

Gall. This is a variable brown, irregularly oval, pustulate swelling 5 to 6 mm in diameter. It occurs here and there on the leaf surface.

- EP Felt: (1915) 31st Report of the State Entomologist on Injurious and Other Insects of the State of New York^©

Reference: https://www.biodiversitylibrary.org/page/36619989#page/544/mode/1up