Alsophis sibonius
Alsophis sibonius, the Dominica racer, Dominican racer,  or Antilles racer, is a species of snake endemic to the Caribbean island of Dominica. Description
It can reach nearly a meter in length. It feeds on lizards and small rodents. It rarely bites humans, but may release a foul-smelling (though harmless) cloacal secretion when disturbed. Taxonomy
Along with Alsophis manselli from Montserrat, it was previously considered a subspecies of Alsophis antillensis. References

Alsophis
Snakes of the Caribbean
Reptiles of Dominica
Endemic fauna of Dominica
Reptiles described in 1879
Taxa named by Edward Drinker Cope