Five species are known:—
(1) C. gracilis.—Red or pale brown, with three longitudinal black lines passing through brown, or black spots; the lateral spots alternating with the vertebræ. Black and yellow bands under the tail and on the belly.
Total length, 740 millimetres; tail 35.
Habitat: Malay Peninsula, Sumatra.
(2) C. trimaculatus.—Head and nape black, with a yellow spot on each side of the occiput; belly uniform red; tail with two black rings.
Total length, 335 millimetres; tail 21.
Habitat: India and Burma.
(3) C. maculiceps.—Head and nape black, with one or two yellow bands on each side. Belly red, two black rings on the tail. Diameter of the eyes equal to two-thirds of the space separating them from the mouth.
Total length, 485 millimetres; tail 30.
Habitat: Burma, Indo-China, Malay Peninsula.