This is a little ghost (Anery and Hypo) male Honduran Milk Snake. 

Species:   Lampropeltis Triangulum Hondurensis
Common Name:   Honduran Milk Snake
Care Level:    Beginner/Intermediate
Lifespan:   10+ years
Adult Size:   Up to 5 feet
Captive Diet:   Frozen/thawed mice
Adult Minimum Tank Size:   30 gallons
Temperature & Humidity:   70-85 degrees