From this site that might help you to id your ants so you know what bait to use:
Depending on the kinds of ants, certain commercial baits can be ingested by workers, taken back to the nest for consumption or regurgitated to feed and kill others in the colony. Commercial bait syrups such as borax (Terro) will kill ants that feed on sweets. Toxic fast-acting baits kill foraging workers quickly, but are less effective as those that are slow-acting, which are taken back to the nest for consumption. Place baits directly on the ant trails away from children and pets. Other baits include boric acid plus mint apple jelly (Drax), hydramethylnon (Maxforce), methroprene (Pharorid), bendiocarb (Ficam), propoxur (Baygon) and sulfluramid (Pro-Control).
I prefer the boric acid type of bait as it's less toxic to the environment.