Observations and pictures of two snakes, Tachymenis peruviana Wiegmann, 1836, and Tachymenis chilensis (Schlegel, 1837), were taken in the Atacama coastal desert, province of Antofagasta, Chile. Furthermore, in the collection of the Museo Nacional de Historia Natural de Santiago, we found two individuals of T. c. chilensis from Cachapoal and Talca provinces. These records represent a northward extension of the known range of T. c. chilensis along the Andean foothills of more than 180 km. © 2010 Check List and Authors.