“The Warka (also known as Marka) and Bozo tribes occupy the northern region of the Bambara territory. Although they speak different languages, they share a number of institutions and are famous for their masks and puppets. Similar to Bambara Ntomo society masks, Warka masks are generally carved with a comb on top of the head, but unlike Bambara masks they are often covered with metal plaques.”

Source:
Baquart, Jean-Baptiste. The Tribal Arts of Africa. New York: Thames and Hudson Inc. 1998. Print.