Rhinocheilus

Rhinocheilus is a genus of snakes, commonly called the long-nosed snakes, in the family Colubridae. The genus is native to the western United States and Mexico.

Species and subspecies
The genus Rhinocheilus contains the following species and subspecies which are recognized as being valid.
 * Rhinocheilus antonii Dugès, 1886
 * Rhinocheilus etheridgei Grismer, 1990 – Etheridge's long-nosed snake
 * Rhinocheilus lecontei Baird & Girard, 1853 – long-nosed snake
 * Rhinocheilus lecontei lecontei Baird & Girard, 1853 – western long-nosed snake
 * Rhinocheilus lecontei tessellatus Garman, 1883 – Texas long-nosed snake