I got 4 queens of Formica subsericea from another keeper in my state last year. I just pulled them from hibernation a few weeks ago. We should see workers in a less than a month since I have them under a heating lamp. I have never heard of much success with this species and multiple queens but I figured I'd give it a go.
Edited by T.C., January 23 2023 - 9:13 PM.