Well in terms of other invertebrate fauna I consider California to be one of the most unique places to hunt as there are a lot of really interesting species to be found; it is a biodiversity hotspot after all. Even in terms of beetles the tenebrionid diversity to be had here is quite incredible; Asbolus, Philolithus, Stenomorpha, Eleodes, Coelocnemis, Schizillus, Cryptoglossa, Edrotes, Triorophus, Eusattus, etc.
Thanks,
Arthroverts