Nebu whitei, from what I understand, is a possibly communal obligate burrower. The venom is painful but not medically significant. I think care in terms of heat/humidity is similar to flat rock, though that's from a questionable source.
Lurus dufoureus is the largest european scorpion. It needs high humidity because, from what I've read, it makes its home near water.
That's all I got. Sorry I couldn't help more (or sooner)
That would be Iurus (member of the Iuridae family Notice the resemblance of names?). Dry climate for this species (60-65% humidity). Be careful with this scorp. Extremely rare in the pet trade and quite a bill, Bill.