I live in S. CA and we had the Ant Problem over a Year ago and they are back.

What seems different about these Ants is at least some are apparently living in the Walls of the House.

My 1920 something House with Plaster Walls and Wooden Floors has a million tiny crackes for the Ants to get through.

What makes these Ants different is that the little ones where I grew up never bit Me.
These Ants when they get on you eventually find a place and Bit.

If we have an Earth Quake out here and living People get trapped under the Rubble the Ants are going to feed on them dead or alive.

Right now the Ants have sort of backed off after Spraying where they were getting into the House; when I could find those spots.

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