A new species of Sphaerodactylus is described from karst areas of the northern slopes of the Sierra Maestra of Cuba. It is most closely related to S. nigropunctatus and S. torrei, and is distinguished from those species and other members of the nigropunctatus group by having a narrower snout, a nearly uniform pattern with no cross-banding in any life stages (juveniles, adult males, and females), and by having a small escutcheon. It is most easily confused with the Cuban species S. elegans, from which it is differs in head and toe pad scalation. ABSTRACT.-A new species of Sphaerodactylus is described from karst areas of the northern slopes of the Sierra Maestra of Cuba. It is most closely related to S. nigropunctatus and S. torrei, and is distinguished from those species and other members of the nigropunctatus group by having a narrower snout, a nearly uniform pattern with no cross-banding in any life stages (juveniles, adult males, and females), and by having a small escutcheon. It is most easily confused with the Cuban species S. elegans, from which it is differs in head and toe pad scalation. In the summer of 1989, while en route by plane from Havana to Santiago de Cuba, we no- ticed a distinctive region of karst terrain in the northern foothills of the Sierra Maestra. During that summer's field work we made a special ef- fort to visit the area, which is roughly south of Jiguani near the border of Granma and Santiago de Cuba provinces. There, we collected speci- mens of a new ring-necked gecko, Sphaerodac- tylus cricoderus (Thomas et al., 1992), and one of us (S.B.H.) also saw, but was unable to collect, a large plain-colored Sphaerodactylus that could not be identified to species. The following year we returned to the site, a coffee-growing settle- ment called La Pimienta, and collected a large, plain-colored female, which, in addition to be- ing unpattered, showed other differences in pigment distribution and scale configuration from any of the known species of Sphaerodacty- lus. We revisited La Pimienta in 1994 and col- lected several more specimens of this lizard, all showing the same distinctive features as the original. We also collected specimens from south of Guisa, some 18 km to the northwest of La Pimienta. In the summer of 1989, while en route by plane from Havana to Santiago de Cuba, we no- ticed a distinctive region of karst terrain in the northern foothills of the Sierra Maestra. During that summer's field work we made a special ef- fort to visit the area, which is roughly south of Jiguani near the border of Granma and Santiago de Cuba provinces. There, we collected speci- mens of a new ring-necked gecko, Sphaerodac- tylus cricoderus (Thomas et al., 1992), and one of us (S.B.H.) also saw, but was unable to collect, a large plain-colored Sphaerodactylus that could not be identified to species. The following year we returned to the site, a coffee-growing settle- ment called La Pimienta, and collected a large, plain-colored female, which, in addition to be- ing unpattered, showed other differences in pigment distribution and scale configuration from any of the known species of Sphaerodacty- lus. We revisited La Pimienta in 1994 and col- lected several more specimens of this lizard, all showing the same distinctive features as the original. We also collected specimens from south of Guisa, some 18 km to the northwest of La Pimienta.