Yep .... those look like mites .


It is a good rule of thumb to quarantine any new snakes, and not bring them anywhere near the rest your collection .

Mites are not that big of a deal. Clean out your tubs, or cages. With the snakes, and water dishes removed, spray the
entire inside of cages/tubs, substrate, and surrounding area with Provent-a-mite, and let it dry. Give your snakes a soak in warm water, to kill some of the mites that are on them. Dry them off and put them and the water dishes back in the cages. In a few days, the mite problem should be resolved.
Re-spray the cages with Provent-a-mite after each time you clean it until all mites are gone.