Lampropeltis triangulum, commonly known as a milk snake or milksnake, is a species of king snake. There are 24 subspecies of milk snakes. Lampropeltis elapsoides, the scarlet kingsnake, was formerly classified as the subspecies L. t. elapsoides, but is now recognized as a distinct species. The subspecies have strikingly different appearances, and many of them have their own common names. Some authorities suggest that this species may be split into several (Wikipedia)

Lampropeltis gentilis, commonly known as the Central Plains milksnake , pale milksnake, Utah milksnake, or New Mexico milksnake, is a species of nonvenomous snake in the family Colubridae. It is found in the United States. (Wikipedia)

The scarlet kingsnake (Lampropeltis elapsoides) is a species of kingsnake found in the southeastern and eastern portions of the United States. Like all kingsnakes, they are nonvenomous. They are found in pine flatwoods, hydric hammocks, pine savannas, mesic pine-oak forests, prairies, cultivated fields, and a variety of suburban habitats; it is not unusual for people to find scarlet kingsnakes in their swimming pools, especially during the spring. Until recently, and for much of the (Wikipedia)

Lampropeltis polyzona, commonly known as the Atlantic Central American milksnake, is a species of nonvenomous snake in the family Colubridae. It is found in Mexico. (Wikipedia)

Lampropeltis annulata, commonly known as the Mexican milk snake, is a nonvenomous species of milk snake. (Wikipedia)

Lampropeltis ruthveni (common name: Ruthven's kingsnake) is a species of kingsnake in the family Colubridae. It was described by Frank N. Blanchard in 1920 and named after American herpetologist Alexander Grant Ruthven. It is endemic to Mexico. (Wikipedia)