+1. they looks like Madagascar flat rocks. nice coloration too!I would say they are Opisthacanthus madagascariensis. Pretty sure of it with the white telson, general colouration of the scorpion and the type of claws it has.
http://www.futtertiere24.de/xtcommerce/product_info.php/info/p1560_Opisthacanthus-madagascariensis--subadult-adult.html
http://www.uniprot.org/taxonomy/167108
http://www.hippocampus-bildarchiv.com/tier_10757_Opisthacanthusmadagascariensis.htm
http://picasaweb.google.com/lh/photo/ZbGe5fvc1Ehda3525BY7CA
I have my suspicions. Can you get a good picture of the bottom of the feet?
Cheers,
Dave