Tetraps: a race of bestial humanoids from Tetrapyriarbus. They look like a combination of human, bat, and boar, and although they have four eyes (one on the front, back, and each side of their heads) their eyesight is poor. They are also characterized by clawed hands, vestigial wing flaps on their arms, and forked tongues that can inject a paralysing poison into their victims. They feed on blood plasma and sleep upside down like bats.