You might want to do yourself and the lizards a big favor and let them go back where you found them. They are difficult to keep, and will need a much larger tank, special lighting, and a dedication to either buying or catching lots of ants.
If you are dead set on keeping them, you should do a lot of reading and get up to speed right away. Primary concerns should be tanks size and temps, proper lighting, and it sounds like you may have a handle on the ants. They will eat a LOT of ants when they are full grown. So you should give it careful consideration.
Best of luck and check out the link below.

Phrynosoma.Org

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