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Callirhytis quercussuttoni (Hymenoptera: Cynipidae) Pinole, Contra Costa County, California October 12, 2017 Stem gall caused by gall wasps on Quercus agrifolia. Gall dissected with pupa exposed. Multiple larval cells visible.
Stem gall caused by gall wasps on Quercus agrifolia. Gall dissected with pupa exposed. Multiple larval cells visible.