Taxonomic revision of the "mexicanus" group of the genus Vaejovis C. L. Koch, 1836 (Scorpiones: Vaejovidae).

Within the scorpion genus Vaejovis C.L. Koch, the "mexicanus" group is composed of species distributed in the mountains of México.

A new Sky Island species of C. L. Koch, 1836 from Sonora, Mexico (Scorpiones, Vaejovidae).

is described from the Sierras Elenita and La Mariquita, Municipio de Cananea, Sonora, Mexico. This species belongs to the "" group of the genus and inhabits pine-oak forests in northern Mexico. This species is compared to its most similar species.

A new species of the "mexicanus" group of the genus Vaejovis C. L. Koch, 1836 from the Mexican state of Aguascalientes (Scorpiones: Vaejovidae).

A new species of Vaejovis is described from the Mexican state of Aguascalientes. It is assigned to the "mexicanus" group and compared with similar species from Jalisco, Guanajuato, and San Luis Potosí. A map with their known distributions is provided.

Two new species of Centruroides Marx 1890 (Scorpiones: Buthidae) from Oaxaca, Mexico.

Centruroides franckei, n. sp. and Centruroides rodolfoi, n.