Not so much "science" as "neglect". There's really no good reason to continue with this (especially considering you don't know what species they are). You might get what you want and have a Myrmica colony with two queens that you'll never be able to spot inside the nest, or more likely, you could wind up killing one or both colonies.
I doubt many people have experience doing this to Myrmica because the survival of their pet colony would have to be foremost in order to keep them successfully in the first place.
Edited by Batspiderfish, May 4 2017 - 12:30 PM.
If you've enjoyed using my expertise and identifications, please do not create undue ecological risk by releasing your ants. The environment which we keep our pet insects is alien and oftentimes unsanitary, so ensure that wild populations stay safe by giving your ants the best care you can manage for the rest of their lives, as we must do with any other pet.
Exotic ants are for those who think that vibrant diversity is something you need to pay money to see. It is illegal to transport live ants across state lines.
----
Black lives still matter.