Callirhytis hopkinsi
Quercus imbricaria
Acorn galls
A pip gall beside young acorns of current season, secreting honeydew, broader than high.
[Photo caption]
On Q imbricaria. Galls drop in early Sept (WV). Adults emerged the second spring Mar 29-Apr 14; third spring Mar 29-Apr 15; fourth spring Apr 13. Dr Hopkins estimated there were 50-100 galls per square foot on ground under tree or over a bushel under one tree.
- LH Weld: (1959) Cynipid galls of the eastern United States©
Reference: https://www.biodiversitylibrary.org/item/273718#page/111/mode/1up