Callirhytis quercussuttoni (Hymenoptera: Cynipidae)   (Synonym: Andricus quercussuttoni)
Gouty Stem Gall Wasp
Los Osos Oaks State Park, Los Osos, San Luis Obispo County, California
March 26, 2013

Old gall with exit holes visible. Host is Quercus agrifolia (coast live oak).