Redescription of the scorpion Centruroides thorelli Kraepelin (Buthidae) and description of two new species

The Central American scorpion Centruroides thorelli Kraepelin 1891 is redescribed, based on examination of the type material and additional specimens now available. It is readily diagnosed by its smaller body size, mottled color pattern, the shape of the female pectinal basal piece, and the shape of the male telson and subaculear tubercle. Two new species related to C. thorelli are also described, one from the lowlands of Guatemala and the other from mountainous areas in southern Tamaulipas and northern San Luis Potosi in Mexico .