Hosts: currant, sumac, skunkbrush (Rhus trilobata – grows in western North America)  (Bugguide)

Larvae cover themselves with their own frass.

3/28/2010

 

8/22/2015  on sumac

 

8/22/2015 on sumac

 

6/3/2010  larva on sumac

 

6/3/2010  larvae on sumac

on Bugguide