Spider and millipede from Shenandoah NP, VA

[hypanartia]

Hi
This are two big bugs found in Shenandoah. The millipede was quite common and found (September) everywhere in the park. I think they are two species of millipedes, but would like to know which one.
Thanks
Jesus

[mantisboy]

The spider is a Black and Yellow Argiope (Argiope aurantia), and I think the millipede is Narceus americanus.