First record of C. olivieri in Monterey Co. appears to be Paul Fenwick's in 2012 (same year as Santa Cruz Co.'s first record):
https://www.inaturalist.org/observations/4282360

With RJ Adams' being the second, and this large group at Royal Oaks January 2018 being the third record.

Curious how close (geographically) all of these are.

So far Monterey Co seems to be the furthest south that this species occurs in CA.