A new genus (Borinken) and five new species (Borinken elyunque, Distigmoptera chamorrae, Kiskeya elyunque, Ulrica eltoro, and U. iviei) from Puerto Rico are described and illustrated. A key to all West Indian Monoplatini genera is provided, as are keys to all species of Kiskeya and to the species of Ulrica from Puerto Rico. A list of the flea beetle genera, along with the number of species and some of the faunal features is presented and discussed for the West Indies.