This entomology book is the first comprehensive tool facilitating the identification of thyretines, the unique group of large arctiids (Arctiidae: Syntominae) restricted almost exclusively to the Afrotropical region. The 194 currently recognized species are catalogued and illustrated. Information on the original description, type locality, and type deposition for each of 332 species-group names is given. Seven genus-group names and 62 species-group names are synonymized. Three genus-group names and eight species-group names are excluded from Thyretini and transferred to another groups of arctiids. The diagnostic features of each species are presented, as well as short information on early stages, biology, and known distribution. The male and female genitalia of most of the species are illustrated by half-tone photographs, and whole moths by color photographs arranged in six plates. When possible, the types are illustrated rather than other specimens. Also included is a complete bibliography treating various aspects of the nomenclature, taxonomy, faunistics, biology, or other information concerning Thyretini.