The four-lined skink (Plestiodon tetragrammus)[2] is a species of lizard, which is endemic to North America.

The long-lined skink is gray to light brown in color and has light stripes from the eyes extending to beyond its forelegs, whereas the short-lined skink is darker in color and has stripes that end before the forelegs.

Juveniles of both subspecies have — like many Plestiodon — a blue tail; this color fades with age.

Plestiodon tetragrammus occurs in northern Mexico and along the Mexican Gulf coast and in western and central Texas.

Both subspecies live in lightly wooded areas, with the short-lined skink having a preference for rocky areas, whereas the long-lined skink is also found in grasslands.