There's a possibility of it being a tick as well. Sometimes they can look like a loose scale when they hang on in odd places.
Also... if you're keeping your snake on anything other than paper towels for the moment, it will be hard to tell if there are any mites still hanging out in the habitat. I would keep him on the towels for a good 2 weeks of mite free before transferring him back to regular bedding if it was mine. But that's me being very paranoid about the little things.
What have you done to try get rid of them so far?