Cynips quercus nigrae n. sp.

Quercus nigra [marilandica]

Irregular, elongated swelling on the under side of the midrib of the leaf.

Found two specimens, in June. One of them extends for about an inch along the vein, the other is shorter; both are greenish, and about 0.2 or 0.3 broad. Each gall contained several flies, which escaped between the 20th and 22nd of June, after which the larger gall appeared pierced with nine holes.

- Baron Osten Sacken: (1861) On the Cynipidae of the North American Oaks and their Galls^©

Reference: https://www.biodiversitylibrary.org/item/22852#page/86/mode/1up