The Hispaniolan masked curly-tailed lizard (Leiocephalus personatus) is a species of lizard in the family Leiocephalidae. The species is sexually dimorphic with the males being considerably larger with impressive red markings on the head around the lower jaw. Females are much smaller and are brown in color with lighter stripes running down the flanks. They reach a snout vent length of up to 25 cm (9.8 in). They are primarily insectivorous.