I have seen 8 colonies that have small little yellow ants that rarely come up to the surface and smell like lemon/orange-ish, and was wondering if my ID was correct. dspdrew pointed out that Lasius are not known to be under 5,000 feet and I live at about 1,500ft in canyon Country, CA. I've done some research as well, and no information that I could find on any site mapped them as being in california at all. They are 4mm in length.