Directed by Ron Ormond, Herbert Tevos | Starring: Jackie Coogan, Richard Travis, Angelo Rossitto, Allan Nixon

A mad scientist, Dr. Aranya (Jackie Coogan), has created giant spiders in his Mexican lab in Zarpa Mesa to create a race of superwomen by injecting spiders with human pituitary growth hormones. Women develop miraculous regenerative powers, but men mutate into disfigured dwarves. Spiders grow to human size and intelligence.

IMDb Mesa of Lost Women movie posters