Cinnamon - I, too, had a problem with ants when I moved into another house. Go to a dollar store and buy some ground cinnamon and put it where you think the ants are coming in. You can even put it on the window sills and it won't hurt your kids or pets. Try it. It works.And from here:
Catnip - I was investigating herb companions for my garden and came across this tidbit. Basil repels flies and mosquitoes. To deter ants, use catnip. Sprinkle it in their paths.
Spearmint - The best solution that I can offer you for ants of any kind is to build a border around your house of spearmint plants. I don't know why they don't like them, but it works. This keeps the little pests away, plus it makes entries smell great!
Natural Ant Repellent - powdered charcoal, turmeric, cayenne pepper, cinammon, citrus oil are great ant “barriers” (ie they apparently won’t cross over these substances).