Aruba, Netherlands Antilles, is a 175 km² xeric island lying off the Caribbean coast of Venezuela. The flat coral and limestone regions of the shore contrast with the rolling hills that rise in the east to elevations of 188 meters. Vegetation types are varied. The island has excellent maps (LENS 1910, MEUTER 1963), and its natural history has been surveyed and described by various scientists, e.g. MARTIN (1888), BAKER (1924), WESTERMANN (1932), WAGENAAR HUMMELINCK (1940a, 1953), Voous (1955, 1957, 1959), STOFFERS (1956), DE BUISONJÉ (1974), while herpetological data have been published by WAGENAAR HUMMELINCK (1940b) and BRONGERSMA (1940, 1948).