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

Unisexual generation stem galls, on Quercus chrysolepis (canyon live oak). The shapes of these galls have been altered by inquiline (guest) wasp larvae, which are located around the bulbous tips.