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Dryocosmus asymmetricus
2222_1291 Photo added 2007-05-27

Dryocosmus asymmetricus (Hymenoptera: Cynipidae)
Split Twig Gall Wasp
Mt Diablo State Park, Contra Costa County, California
April 28, 2007

On Quercus chrysolepis (Canyon Live Oak). The wasps have already emerged from the gall. Notice the chambers that each held one wasp.

all photos and text © Joyce Gross