''Rhadinaea hesperia'', the western graceful brown snake, is a species of snake in the family

Colubridae Colubridae (, commonly known as colubrids , from , 'snake') is a family of snakes. With 249 genera, it is the largest snake family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. C ...

. It is found in

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

References

* Reptiles described in 1940 Rhadinaea Snakes of North America Endemic reptiles of Mexico {{Dipsadinae-stub