Male Thief Bug

 is the male version of a Thief Bug. It is very fast and aggressive to protect its mate and larvae. A large blue insect, the male Thief Bug is considerably powerful. They're also very aggressive towards Normans.

Morphology
This is a diagram of this monster's life cycle.

Ragnarok Online II
In RO2, Male Thief Bug is a Prontera Culverts dungeon monster that attacks invading Norman adventurers.