What country is this?

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."

Answerstratovolcanoes///near or in the ring of fire;

The peak above is part of the  sierra madre occidentals ,  a chain of volcanic mountains that runs through the middle of central america.