CAPUT LUPINUM, Eng. law. Having the head of a wolf. An outlawed felon was said to have the head of a wolf, and might have been killed by any one legally. Now, such killing would be murder. 1. Hale, Pl. C. 497. The rules of the common law on this subject are much more severe in their consequences, than the doctrine of the civil law relating to civil death. See 1 Toull. Droit Civil, n. 280, and pp. 254-5, note 3.