Alsophis is a genus of snakes in the Colubroid Dipsadidae family. They are among those snakes called " racers" and occur throughout the Caribbean. One species in the genus Alsophis is one of the world’s rarest known snakes. Snakes of the genus Alsophis are small and rear- fanged snakes, and they are considered harmless to humans. This genus contains at least eight described species. Several species once included in this genus have been placed in the genera Borikenophis and Pseudalsophis.