2009:
Queretaro
Hidalgo
Sonora
Guerrero

2008:
New Mexico
Arizona
Michoacan, Guerrero
Texas, New Mexico
California
Arizona, New Mexico
Baja California peninsula/islands
Arizona California New Mexico
Mississippi Louisiana
Arizona Nevada
Guerrero
Colima

2007:
Arizona New Mexico
Arizona
Arizona California New Mexico
Nevada
New Mexico Texas
Jalisco
Arizona Utah
Arizona New Mexico Texas
Morelos Guanajuato
Oaxaca Guerrero
Guerrero
Utah
Michoacan

2006:
Chiapas
California Nevada
Nuevo Leon San Luis Potosi Tamaulipas
Coahuila
Chihuahua Sonora
Oaxaca
Arizona New Mexico
Pacific Coast of Mexico
Veracruz
San Luis Potosí, Hidalgo, Querétaro
Michoacan, Guanajuato

2005:
Oaxaca
Pueblo, Oaxaca
California, Nevada
Veracruz, Chiapas
Durango, Chihuahua
México, Nayarit, Jalisco, Colima
Michoacan, Aguascalientes, Zacatecas, Jalisco, Colima
Sonora,Baja California, Baja California Sur
Chiapas (II)
Chiapas (I)

2004:
Puebla, Oaxaca, Chiapas, Tabasco
Tamaulipas, San Luis Potosí, Veracruz, Puebla, Oaxaca
southern California
Baja California Sur
Arizona, New México, Baja California, Baja California Sur

2002:
Arizona, New México
D.F., Puebla, Veracruz, Oaxaca, Edo. México, San Luis Potosí, Tamaulipas, Hidalgo

México (San Luis Potosi, Hidalgo, Queretaro: Huasteca Hidalguense Region) 2006

27–30 April, 2006: Partially funded by the NSF REVSYS grant. Dr Oscar Francke, Gabriel Villegas (Ph.D. student, IBUNAM), Ricardo Paredes (M.S. student, IBUNAM) and Alejandro Valdez (undergraduate, IBUNAM) travelled approximately 985 km, the Mexican status of San Luis Potosí, Querétaro and Hidalgo. Collections were made at altitudes ranging 100-2300 m in semidesert and tropical forest. More than 70 scorpion specimens, in three genera and four species, were collected, including two species of the Vaejovis nitidulus complex required for DNA analysis, and previously known from a only few specimens each. Adequate samples of these taxa were secured, in addition to samples of a rarely collected species of Centruroides.