Hi there. Past couple of weeks we have been invaded by these little dudes. They are about 1-2 mm in length and can fly. They seem to be more in our office than any other place. At first I thought they were harmless but after they land on you they will bite. If they will stay outside they can live a happy life but now that they are inside it is time to fight back. I am curious to know the identity of this small insect. If it helps I am in central Texas. Any ideas?