The tigerus, a type of lamia, appears in Dangerous Denizens: The Monsters of Tellene (2003), for the Kingdoms of Kalamar setting [REF].
The lamia appears in the Monster Manual for this edition (2008), where it is described as a swarm of insects that inhabits the dead bodies of sentient fey (including elves, an elf-like race called eladrin, and gnomes), devouring their internal organs and using the hollowed-out bodies as a disguise.