Nailed it. Those eyes are very different then other beetles.Kinda looks like a glassy winged sharpshooter or something
Seems it's an invasive in SoCal
Glassy-Winged Sharpshooter, Homalodisca vitripennis The Situation: The glassy-winged sharpshooter (GWSS), likely introduced from the southeastern U.S. as eggs on nursery stock, was first observed in Orange and Ventura counties in California in 1989. It has a large plant-host range and is...cisr.ucr.edu
If it is that..there is a wasp that loves them, but mantis, assassin bugs, lacewings provide some control.