Undetermined species [unlike other undescribed species in this source, Weld does not list this species in his 1959 book]
Found under large trees of Q. coccinea in May and probably bud galls. Globular, slightly compressed, with a scar and short stalk at base, a linear indentation at the apex, no nipple, 3 by 4 mm., brownish or purplish, mottled.
”- LH Weld: (1928) Cynipid Galls of the Chicago Area©
Reference: https://www.biodiversitylibrary.org/page/57505981#page/190/mode/1up