They appear to be large, brown cockroaches. They are often contained within the body of an Isolationist.
They make an insect-like scuttling sound as they move their many legs.
They serve much of the same purpose as the Festering Rats in the previous game, rushing at Torque in a swarm and exploding on contact.
How to KillEdit
Being very similar to the Festering Rats, they have much of the same weaknesses as them, including fire.