-Spotted Python
-Children's Python
-Diamond Python
-Bredli Python
-Angolan Python

Hog Island boas are just one locality of the Boa Constrictor Imperator, which is different from the true red tails (Boa Constrictor Constrictor).
There are also:
-Boa Constrictor Occidentalis (Argentina)
-Boa Constrictor Longicauda (Peruvian Long Tail)
-Boa Constrictor Amarali (Bolivia)
-Boa Constrictor Sabogae (Pearl Island)