This is the exact opposite of my experience. Subumbratus are similar to latipes and murphyi in that they die very quickly without hosts and even with hosts will drop dead for no reason. I've had the best results by swarming them with tons of neoniger workers in the same way you would with a latipes queen. They’re like tanks and can easily survive.
Compared to latipes aphidicola interjectus and a couple others I would say easy. They would never die on me(for no reason at least)and were the quickest to lay eggs and never ate their eggs(lasius subumbratus that is).
Edited by BDantsalberta, January 10 2023 - 10:48 AM.