Callirhytis difficilis
Quercus cinerea [incana], laurifolia, myrtifolia, nigra, phellos
Stem galls, detachable
Small, rugose, grayish, in a cluster or rows from furrows in bark, dropping when mature in Oct.
[Photo caption]
On Q cinerea [incana]. Also on Q nigra, myrtifolia, phellos, laurifolia. Collected in Oct 1917 in AR. Galls gave adults Sept 29 and Dec 8 1919 and Oct 10, 1920.
- LH Weld: (1959) Cynipid galls of the eastern United States©
Reference: https://www.biodiversitylibrary.org/item/273718#page/117/mode/1up