From the Wikipedia entry.
Species: B. smithi
(F. O. Pickard-Cambridge, 1897)
Mexican redknee tarantula (Brachypelma smithi) is a terrestrial tarantula native to the western faces of the Sierra Madre Occidental and Sierra Madre del Sur mountain ranges in Mexico. They are a large species, and are a popular choice for enthusiasts. Like most tarantulas, they have a long lifespan.