The status and location of the type series of Enicocephalus flavicollis Westwood, 1837 (type species of Enicocephalus Westwood, 1837, the type genus of Enicocephalidae) from St. Vincent Island (Lesser Antilles) is discussed, and instead of two formerly assumed different ‘holotypes’ the lectotype and paralectotype are designated.
Males of E. flavicollis are redescribed, the 5th instar larva is described for the first time, and diagnostic characters of the species are reviewed. Species of Enicocephalus are listed and pterygopolymorphism of females is reviewed.
Enicocephalus dominica Bruner, 1924 is a correct original spelling of the species name (not E. dominicus nor E. dominicanus).