What is "demansia"

Demansia is a genus of snake of the family Elapidae; members of the genus are commonly known as whip snakes. All species of the genus are on gray, brown, gray-green or beige, save for the Yellow-faced whip snake, which may be cream-coloured. Whip snakes are long and slender. They have large eyes and relatively small heads that are only slightly wider than their bodies. The species is venomous. Whip snakes are found in Australia, Papua New Guinea in the area around Port Moresby, and nearby islands.