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Feron atrimentum
2222_2688 Photo added 2015-09-20

Feron atrimentum (Hymenoptera: Cynipidae)
Striped Volcano Gall Wasp
Mt Diablo State Park, Contra Costa County, California
May 22, 2014

Host is Quercus douglasii (blue oak). This is the spring, bisexual generation gall of this species, cut open to show the larva inside the larval chamber.

all photos and text © Joyce Gross