I was up in Los Angeles today (Southern California) and found a colony of Wasmannia auropunctata. I found them nesting near a wall, but in the sand along it near the sidewalk.
In the colony, I got over 500 workers and a lot of winged females and a couple non-winged females (but one died). However, no males were present and a lot of the winged females took off their wings when I put them in my ant collecting container. They had small dirt piles/mounds along the sand. It looked like kind of a new colony (maybe a year or two).
All around the area were Argentine ants and irrigated areas (and there was an outdoor garden nearby too that had a bunch of exotic plants you could walk around and look at). The area didn't seem much like a Solenopsis molesta kind of place to nest as they tend to live in drier areas and not so much irrigated areas. So, I had a feeling they might have been a non-native ant. Turns out with my wife's help, I was right.
Edited by Vendayn, June 8 2015 - 8:04 PM.