Central and western México (Estado de México, Nayarit, Jalisco, Colima): 12 days (23 July–4August, 2005), funded by the NSF REVSYS Vaejovidae grant.  AMNH-CUNY Ph.D. Student Edmundo González and Scientific Assistant Randy Mercurio travelled ca. 3,000 km through Estado de México, Nayarit, Jalisco and Colima in central and western México.  Collections were made in deciduous tropical forest, oak-pine forest, and rainforest, at elevations ranging from 50m to 2,000m.  Approximately 300 scorpions (3 genera and 14 species), including several new species of Vaejovis belonging to the mexicanus and eusthenuragroups, the unknown female of V. nayarit, a possible new species ofCentruroides, and a new species of Diplocentrus, were collected, in addition to ca. 200 amblypygids, uropygids, solpugids, myriapods and spiders.