There are species of ants that have more than one queen and they cooperate. You could have Hive Mind 'managers', a Dreenoi that is a different color to the Starguard and pheromones/telepathy to operate independently, possibly for a finite amount of time.
Captives could contribute genetic material to the Queen for hybrid experimentaion.
Steal from other games' bug races-Phraints, Star Frontiers and Empire of the Petal Throne have some nasty ones.
Other races-Synistryans-dark elf raiders, Aurelians-scifi high elves, NewMan-evolved one to two levels above humans, Cyberiad-cyborgs, full borgs, AI etc., Uplift Concordat-genetically enhanced 'manimals', neo-animals, Brutalz-space ork Vikings, human/mutant Drifter Colonies(mobile city-state freeholds), VyrmStar-humanoid dragon species, Hesperans-the Dominata, 'amazons/mord sith types',
All of them could fight over a space ledge and entrance to a Ringworld.
Meat popsicles-humans from the 20th/21st C. woken up in this era.
I gave my copies of the rules to my nephew-thinking of getting back into it. You gave me ideas.