Desert stalker

Desert stalkers are creatures found in the American Southwest. They are giant, mutated antlions.

Characteristics
One of the predators unique to the Sonoran desert and its outlying areas, the desert stalker attacks by burrowing up from the ground underneath the victim and dragging them back down into the earth with razor-sharp mandibles. Desert stalkers have an uncanny ability to hunt for the weakest person in any group; picking them off while they're the least aware of the danger and catching the rest of the group off-guard as well.

Appearances
Desert stalkers were to appear in Van Buren, the canceled Fallout 3 by Black Isle Studios.