Habitat: Venezuela, Guianas, Northern Brazil, North-east Peru.
(2) E. heterochilus.—Six supralabials, second and third entering the eye; snout narrow; 209 ventrals.
Colour red, with black annuli, as in E. marcgravii.
Total length, 553 millimetres; tail 43.
Habitat: Brazil.
(3) E. euryxanthus (Sonoran Coral Snake).—Seven supralabials, third and fourth entering the eye; internasals nearly as long as the præfrontals; 215-241 ventrals; 21-29 subcaudals.
Colour red, with 11 black annuli edged with yellow; head black.
Total length, 400 millimetres; tail 33.
Habitat: Arizona, Colorado, North-western Mexico. It is found in Arizona up to an altitude of nearly 6,000 feet (1,800 metres).
(4) E. gravenhorstii.—First lower labial in contact with its fellow; posterior nasal not reaching the præocular: 191 ventrals; 23 subcaudals.