This beetle was found alive in my house, upside down floating in the cat's water bowl. My best guess is that it came in on firewood. The odd thing is that we do have Jeffrey Pine (one of this species' hosts) in the area, but no firewood from these pines has been in the house in years. The firewood was mostly manzanita and oak wood, from dead trees on our property dating back to the 2003 Cedar Fire. There was a small amount of untreated scrap wood from old construction projects amongst the firewood also - likely Douglas fir, another host. So the exact origin of this beetle is unclear.