The Tunnelers

 is a quest in the Fallout: New Vegas add-on Lonesome Road.

Quick walkthrough
The quest begins when you kill your first tunneler. The Quest ends when you've killed every tunneler and their Queen.

BEWARE: when you approach the end of the cave you will see an archway, when you pass through that the tunneler queen and at least 4 tunnelers of varying types will appear, and it is very easy to be overwelmed by them. High level characters will also face a tough fight here.