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Andricus quercuscalifornicus (Hymenoptera: Cynipidae) California Gall Wasp Mt Diablo State Park, Contra Costa County, California April 1, 2007 On Quercus lobata (Valley Oak). Small new gall on the right growing next to a previous year's gall on the left.
On Quercus lobata (Valley Oak). Small new gall on the right growing next to a previous year's gall on the left.