Tityus michelii Armas, 1982 .

DISTRIBUTION. Only known from the type locality: Puerto Rico: Ponce municipality: Guánica Forest. This is a very rare species of which only limited specimens have been collected (Teruel & Armas, 2006). As pointed out by Teruel & Sánchez (2009: 332), it is probable that some of the 25 adult specimens mentioned by Santiago-Blay (2009: 118) really belong to Tityus riverai (unfortunately, data of those specimens are unknown).