Riders of the Whistling Skull is a 1937 "Three Mesquiteers" Western B-movie[1] of the weird western genre starring Bob Livingston, Ray "Crash" Corrigan, and ventriloquist Max Terhune with his dummy Elmer.

It was directed by Mack V. Wright, produced by Nat Levine and released by Republic Pictures.

Meanwhile, the Three Mesquiteers have discovered a delirious man wandering the desert and bring him to town where Betty recognizes him as a member of her missing father's expedition.

As the man slowly gets his memory back the party wishes to know the location of Professor Marsh and Lukachukai that contains an ancient legendary treasure.

Keen on his detective magazine that he constantly carries with him, Stony and the Mesquiteers lead an expedition to find Professor Marsh, the lost city and its treasure and the murderer.