Heteroecus pacificus (Hymenoptera: Cynipidae)
Beaked Spindle Gall Wasp
Blue Oak Ranch Reserve, Santa Clara County, California
September 3, 2011

Dorsal side of leaves with bisexual generation leaf galls. On underside of leaves, galls have a conical shape (visible at top of photo). Galls are on Quercus chrysolepis (canyon live oak).