Another thing to add about Psalmopeous sp. is that, especially when young, they tend to burrow as well as hang out in elevated locations. While they don't make a burrow like a terrestrial does, they often dig out little trenches for themselves and sometimes will extend their tubes from it upward. So, don't freak out if your Psalm. takes to sitting at the bottom and tossing dirt every now and then.

As they mature, they tend to not burrow as much.....unless they have been mated. Females will often times, if given ample substrate, dig a rather deep burrow and lay their egg sacs there and stay in the burrow until the slings hatch out.