The Montserrat galliwasp or Montiserrat galliwasp (Diploglossus montisserrati) is a species of lizard in the Anguidae family endemic to Montserrat in the Caribbean Lesser Antilles, and is the only anguid species in the region. It can reach 180 mm snout-to-vent, with well-developed limbs. It is brown all over, with white speckling on its flanks and legs, subtle dark lines around its neck, and white scales speckled with brown on its upper mouth.