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Andricus atrimentus
2222_1339 Photo added 2007-08-13

Andricus atrimentus (Hymenoptera: Cynipidae)
Striped Volcano Gall Wasp
Mt Diablo State Park, Contra Costa County, California
April 1, 2007

On Quercus douglasii (blue oak). This gall is the spring (bisexual) generation of this gall.

all photos and text © Joyce Gross