Neuroterus escharensis, new species

Host.--Quercus bicolor.

Gall.--A minute cell hidden in the tissue of the twig under a leaf scar, the tip protruding so slightly as to be scarcely noticed until the adult within begins to cut out a hole by which to emerge. Sometimes two cells occur side by side under the same leaf scar and more rarely the exit hole is just above the boundary of the scar. They may be found in winter or spring in previous seasons' growth usually underneath the scars just below the terminal bud cluster.

Biology.--On April 24, 1909, flies were found at Evanston IL ovipositing on the buds of bicolor, perched on the side of the bud with the ovipositor thrust perpendicularly through the bud scales. Investigation revealed the galls described above in the leaf scars under these buds with adults just emerging.

A precisely similar gall was found at Ravinia on Q alba.

- LH Weld: (1926) Field notes on gall-inhabiting cynipid wasps with descriptions of new species^©

Reference: https://www.biodiversitylibrary.org/page/7610635#page/273/mode/1up