The word egungun, masquerades, is often used to describe all masked figures found among the Yoruba of Nigeria. It is, strictly speaking, applicable only to those found among the Oyo Yoruba, hence Egungun Oyo, Oyo masquerades (cf. Adedeji 1969: 6; Beier 1958: 5). This type has diffused to other sub-groups where it occurs with local types such as Gelede in Egbado, Agemo in Ijebu, and Epa in northern Ekiti. Its ubiquity may be due to the movement southwards of Oyo Yoruba elements, the extent of Oyo and later Ibadan Empires, peaceful migration and cultural contacts with neighbouring sub-groups (see Fig. 1 inset).