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Andricus albobalani
2222_3243 Photo added 2021-06-17

Andricus albobalani (Hymenoptera: Cynipidae)
Mt Diablo State Park, Contra Costa County, California
November 24, 2017

Stunted Quercus douglasii (blue oak) acorn, cut open in search of gall wasps. The image on the right shows just the embryo of the acorn with a now-open larval chamber and the wasp larva that was in it.

all photos and text © Joyce Gross