Scorpions collected in the Makay mountain range, Madagascar (Scorpiones: Hormuridae, Buthidae) and with description of a new species

New considerations regarding Grosphus limbatus (Pocock, 1889), described from an undefined locality in Madagascar, are proposed. One new species, Grosphus makay sp. n., closely allied to G. limbatus, is described from the Makay sandstone mountain range, Atsimo-Andrefana Region (ex Province of Toliara) in south-western Madagascar. The description of the new species brings further evidence of the existence of micro-endemic and vicariant populations within the Malagasy scorpion fauna.