The worker bug is the most common bug in the arachnids army, they range form the workers who dig tunnels, to the chariot bugs who carry brains between tunnels. They have zero threat profile.
The most common warrior bug is still responsible for the most MI deaths. While many deadly various of this breed exist, the most basic bug can not be under estimated, be it alone or in a swarm as they tend to attack.
These little bugs are huge, and tend to only be a threat in terms of being mobile artillery, and a threat to all Fleet ships and drop ships in the mission sector. Able to ‘spit’ into orbit, they can bring down a ship with a single well placed shot.