Arachnids is a mod based on the first Starship Troopers movie and 2005 game about an alien race of bugs.
The Warrior Bug is the basic grunt of the Arachnid species.
Brain Bugs are the leaders of bug colonies
Worker bugs do the manual labour for the pseudo-Arachnid colonies, digging and upkeeping the tunnels.
Small and low-armored bug, considered to be one the lowly worker types.
The Hopper Bugs are essentially a Warrior bug with wings.