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.
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.