This beautiful green stink bug was on Horseweed (
Erigeron canadensis) at the Claremont Colleges'
Bernard Field Station in an area of recovering coastal sage scrub that had burned about eight months previously. My first thought was that it was either
Thyanta custator or
Thyanta pallidovirens, which were the only green stinkbugs previously identified at the BFS, but thanks to Ross's help, I see now that this is an entirely different species.