Callirhytis quercusagrifoliae (Hymenoptera: Cynipidae)   (Synonym: Andricus quercusagrifoliae)
Live Oak Bud Gall Wasp
Knowland Park, Oakland, Alameda County, California
September 27, 2009

All of these galls were found on the ground underneath a coast live oak (Quercus agrifolia).