Heteroecus sp. (Hymenoptera: Cynipidae)
Hair Capsule Gall Wasp
Off Hwy 4 near Sky High, Calaveras County, California
November 24, 2007

Images show both sides of the gall. An exit hole is visible in the bottom image. The wasp that makes this gall has not yet been scientifically described. On Quercus vacciniifolia (huckleberry oak).