The Spider (Earth vs the Spider)

A giant mutant tarantula of unknown orgins that serves as the villain of the black and white science fiction horror movie Earth vs the Spider. The giant spider lives in a cave in the far sides of an unnamed town and feeds on trespassers. It kills a girls father and she nd her friend go searching for him, finding the cave and the spider. The two escape and get back to town to get help. The spider is rendered unconsis byy a mass release of ddt and captured by scientests who want to learn what made it grow so large to prevent other spiders from doing the same (we never learn what made it grow). The creature awakens and kills a number of people before returning to its cave where it dies from impailement on stalagmites.