Composition of the genus Centruroides Marx, 1890 (Scorpiones: Buthidae) in Colombia, with description of a new species Abstract: A new species of the genus Centruroides Marx, 1890 is described from San Andres Island, and the presence in Colombia of C. gracilis (Latreille, 1804), possibly by introduction, is confirmed. New data on C. margaritatus (Gervais, 1841) and C. edwardsii (Gervais, 1843) are given, and a key is provided for the identification of the four Colombian species belonging to this genus.