They are a Raider clan who are currently stationed in the Forbidden Lands near the Twin Mothers' village. They are called "Scorpion's Bite" because they use Radscorpion Poison Dart guns. The leader is Burk. They are thinking about invading the Twin Mothers Village. There is also a snitch in the clan, called Trisha, who is working for the Caesar's Legion to recover some stolen Caesar's Legionholodisks.
Scorpion's Bite have not appeared nor are they mentioned in any published game. They were to appear only in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is not certain if they will appear in any future Fallout game.