México (Michoacan, Guanajuato: Sierra de los Agustinos): Three days (20–23 March, 2006), partially funded by the NSF REVSYS grant. Dr Oscar Francke, Gabriel Villegas (Ph.D. student, IBUNAM), Hector Montaño and Alejandro Valdez (undergraduates, IBUNAM), and Carlos Santibáñez (undergraduate, Instituto Tecnológico del Valle de Oaxaca) travelled ca. 600 km through the Mexican states of Guanajuato and Michoacan at altitudes ranging from 2000 to 2500 meters. The dominant vegetation during the trip included pine and oak dry forest. Approximately 90 specimens, including three genera and four species of scorpions, were collected. Of particular interested were small isolated populations of the Vaejovis pusillus group on various mountain-tops which apparently show the same inselberg pattern of differentiation observed in their northern relatives of the Vaejovis vorhiesi complex.