ground beetle larva

ground beetle larva

5884  Hi I have lived in Washington state all my life and have never ran across anything like this before. I was out at night in late fall and found this guy under a bunch of leave next to a “rollie pollie” bug, a big rollie pollie bug! Wondering if it’s related to the rollie pollie or if it’s something else ? Thank you Tammy. 

This is a repeat of post no. 5868, a ground beetle larva. Ed Saugstad, retired entomologist; Sinks Grove, WV.