Centruroides schmidti Sissom, 1995 is the new identification designate of the scorpions previously known as C. thorelli (Kraepelin, 1891) in Northwest Costa Rica. The geographical distribution of the species in this country is established on the basis of new collected material. Its distribution includes the Pacific slope of the Guanacaste volcanic range, and the Pacific and Atlantic slopes of the Tilarán volcanic range between 50 and 775 m elevation above sea level, within the Costa Rican Guanacaste and Alajuela provinces
Keywords: scorpiones, buthidae, centruroides schmidti, c thorellii, distribution, costa rica