'Familiar Spirits' in the Bible

Now, Samuel, was dead, and all Israel had lamented him, and buried him in Ramah, even in his own city, - Saul, moreover had put away them who had familiar spirits and them who were oracles, out of the land.

And the woman said unto him - Lo! thou, knowest what Saul hath done, how he hath cut off them who have familiar spirits and him who is an oracle, out of the land, - wherefore, then, art thou striking at my life, to put me to death?