The AntsCanada Forum

Lasius are pretty hardy ants so they should be OK at temperatures above 0 °C.
At room temperature they are still active but brood stops developing and the ants are waiting for winter.

Do you keep them in a cold place?

These are small larvae and will not continue developing without hibernation.
You can hibernate them now.
Good luck!

Really? I've never seen anything like it. Can you make a photo?
I recommend hibernating them.

A small insect every 2 to 3 days should be OK.
Good luck!

Crematogaster sp. I think.

I'm not sure if she is Solenopsis. Might be Pheidole, Monomorium and others.
Can you make a few more photos?

Another alternative of the test tube can be a tic tac box.
I don't think you will need the nest already.

Be sure to provide her with water.

Solenopsis geminata I guess.