iv just had snake mites and the white your refering to is acutaly the might poo. the mights as someone said above are browny grey.
i had scorpions for a while do you have desert scorps or black (forest/rock) scorps.
if you have white spects moving around the mums back you probably have babys they will be only on her back and youll find you will have hundereds of them. i i were you i would speak to the breeder/petshop guy you got her off and buy some pinhead crickets.
umm guys i have kept scorpions for about 2 yrs now..i no what babies look like and how big they are...the little things im talking bout arent might poo..the are like 1mm in length and they move around i have probably seen bout 3-4 now and they move around on the floor nowhere near the scorpion
ive seen them, they love logs and rotting things in water, they walk on the surface and on the edge of water.
i dont think they cause any trouble. if theyre the one's your talikng about