Try Terro ant killer/baits/motels, sprinkle used coffee grounds around the area, pour boiling water on them...each depending on where the ants are located.
You could bait them with sugar or honey to a location where you can pour the boiling water on them. (I feel so evil plotting to kill ants.)
We call them crazy ants or sugar ants - they are like ants on speed.
Here is my newest weapon: Splenda. Just sprinkle it, ants think it's sugar, they get a tummy ache and go else where to find better food.