Here is how I successfully eliminated multiple ant colonies around our homes. I have no remorse for what I have done.
Step 1: Borax!
This is the ingredient in commercial ant bait. I got this box from a local hardware.
Step 2: A Small Container.
This cap I got from a used bottle of engine Coolant. Perfect for setting the trap.
Step 3: The Delectable Delight.
Who doesn't like brown sugar? No ants that I know of. I covered the bottom of the container with sugar crystals.
Step 4: Mixing the Concoction.
I put quarter tablespoon of borax with the sugar then added water. A little mixing and all is ready.
Step 5: Setting the Trap.
Putting the trap in any convenient location will have those sugar stealing bastards, I mean ants, coming running.
Once they are fed like this for couple days they will keep ferrying poisoned food to the nest.
After a few days the colony should be in dire straits. Total genocide should occur in a week.