I know that I've already posted this somewhere in the social parasite journal within the keeping ants section (because these were, technically, kept ants) but I think it's interesting enough to place here as well. We see a small group of Lasius umbratus host workers with two queens of Lasius subumbratus. The pupae are host brood which consisted of about 50% workers or males. It's usually told that parasitic Lasius queens will not participate in brood care once they are adopted by a host colony. I have, however, seen Lasius umbratus queens tend to larvae, and now a Lasius subumbratus queen opening a cocoon.