Melikaiella flora (Hymenoptera: Cynipidae)
Live Oak Petiole Gall Wasp
Knowland Park, Oakland, Alameda County, California
December 8, 2012

Old galls with exit holes. Host is Quercus agrifolia (coast live oak). Galls are on the petioles and midrib veins, and each has caused the rest of the leaf surrounding the gall to die. Gall is polythalamous (multiple larvae).