Mix Borax and granulated sugar in equal amounts. place it under the hive where it won't rain into it. Cover it enough that the bees can't get to it, but the ants can. They will carry the borax back into the hive and all will die.
I got a couple hives that I have had some ant problems with. Its usually the ones that more shade than most. The hives are strong and seam to keep the ants above the inner cover. I usually just shake them off onto the ground and move on.
I usually dont have ant problems but today while changing out feeders In one of my bee yards every hive I opened had little ants on the inner cover Bees was able to get to them they want letting them down in the hive. This is the first time i have had ant problems in this yard. But on the up side they are letting the alfalfa go to seed so the can harvest the seed. That breaks my heart. ancing: :yahoo:
I had a what we call "bull ants" problem once and mixed up a formula like Iddee's. Drilled some small holes horizontally in a empty coffee container with a snap on top with the stuff in it. When they didn't find it right off the bat I wiped some syrup around the holes. Syrup and borax didn't work as well as dry, just attracted fireants.