Bark Scorpion

There is actually a chance this is C.margaritatus. Both C.bicolor and C.margaritatus are higly polymorphic and without getting them under a microscope it is impossible to tell for sure .. in fact, I wouldn't be surprised if the entire taxonomic status got shuffled on the next revision of the genus. Still, you are firmly in C.bicolor range and the colouration is quite striking so one would lean towards what people seem to commonly identify as C.bicolor.