Absolute hell of a mega nest.
It's a massive and sprawling network of trenches and craters with walled off alcoves protecting 3 elite bug holes.
Name references the cave housing the brain bug near the end of Starship Troopers, which the characters refer to as Bug City.
Visually: High walls in a circle, huge size, deep pit.
On the Map: Massive size on the map (you can't even get the entire radar signature with one ping), shape of alcoves.
Elite bug holes look like the holes found in Stalker Lairs and spawn either Alpha Commanders or Bile Spewers on Bile Spewer constellation maps.
It's pretty much divided into 3 sections. Two high alcoves guarding two elite bug holes, and a deep pit in the center protected by high walls.
I start at the section of the base farthest away from the elite bug holes since it has so no walls and is the least guarded.
I throw an Orbital Walking Barrage angled to destroy most of the holes in the pit, and then an Orbital 380mm HE Barrage to destroy a few more holes in the interior.
I run around the walls of one of the alcoves and throw an Eagle 500kg Bomb inside, before moving on to destroy one of the other alcoves.
Lastly I move inside the base to destroy a few holes my barrages missed.