Well after reading your post and rereading it, I am kind of inclined to think they might be a larvae of some type. What you could do is place some clear or Scotch tape over one the next time you see one and tape it to a piece of clean white paper. You can take this paper to your local exterminator who will be able to tell you what it is and possibly how to be rid of them. I hope this helps you and gets rid of your bug problem.