[jmmec2014]

I should have written “colonies” for “Fipronil solved the problem and killed off the entire colony.”

There were many (many) colonies of these ants all around: in the trees, along the power line that goes to the house, in the house, etc...

I tried some of the other remedies mentioned by others in this post. These ants are not attracted to baits or any natural remedies. Waste of time.

I finally came across Fipronil (via Termidor) and sprayed it according to directions. The ants walk through the Fipronil, it gets on them, and they carry it back to their colony where it passes ant-to-ant and soon (not immediately) kills them all off.

Within 3 days of spraying Fipronil the ants were significantly diminished in number. Within 5 days there were stragglers here and htere. Within 7 days they were gone.

A $60 bottle of Termidor has a shelf life of 5 years (which really means 10 years) and I’ll probably use it up within 6-7 years spraying 2x a year. The pest control company charged $100 to lay out worthless baits on their first and only visit. Termidor is my pest control company now.

[Yosemitest]

I've mixed yeast with sugar dissolved in honey and set out in a jar lid.
The ants eat it and the yeasty expands inside of them and they explode.
It took several days to work, but after about 5 days, other types of ants quit coming.

But the mixture stinks a little, looks bad, and is just too slow.
I haven't tried it on these crazy ants.

[Yosemitest]

Is this what you're talking about?

Termidor SC Termiticide 20 oz.
Active ingredient
fipronil: 5-amino-1-(2,6-dichloro-4-(trifluoromethyl) phenyl)-4-((1,R,S)-(trifluoromethyl)sulfinyl) -1-H-pyrazole-3-carbonitrile . . . . . . . . . . . . . . . . . . . . . . . . . 9.1%