very difficult to get rid of. There are cycles /stages of eggs that hatch so you must re- treat everything several times.
It's strange that you say these black bugs jumped on you like fleas, as I did not think snake mites(the tiny blackish ones ) would do that.
I had a snake years ago, small and he had them, and they were very tiny like pepper sized bugs that crawled on me after handling the garter snake.
Never saw any black jumpers, but I have not had much experience with them and can not rule them out.
Collareds usually get what we call chiggers, they turn a redish orangey color.
Have you had him near any other reptiles/snakes? Did you just get him recently? Are you using dirt/soil as a substrate?
If they are mites you have your work cut out for you. Below is a link that may help you out, let us know how you make out!
MITES
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