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

Unisexual generation stem gall, on Quercus chrysolepis (canyon live oak). The shape of this gall has been altered by inquiline (guest) wasp larvae, which are located around the bulbous tip.