Found seven or eight of these larvae on the underside of a rather ripe gilled mushroom on a cool day in a wet area. They have a "sticky foot" on their posterior that they use a lot. I placed them on a piece of the mushroom on a damp paper towel atop of 8-10mm of soil for them to pupate in.

You'll see a springtail or two in these images of various individuals in the group.