Nope. The problem of importation of live organisms not only lies with whether that species can adapt to new environment, and also causes a harm to native species, but also other parasitic organisms (including insects, ticks, plant parts, pathogens, etc.) that is attached to THAT organism(s). So even if D. tityus is already occur in the U.S., does not mean you can import it from Japan, China, Taiwan, or elsewhere.