Anita C. Leight Estuary Center, Abingdon Harford Cnty Md.Edgewood Quad 39076_D3bugguide.net/node/view/2007925How it got its name; from BugGuide: Covered with rough scales or points like those on shagreen (a type of leather).
Gunpowder Falls State Park Hereford, MarylandHosts on a variety of trees and shrubs that include birch, hickory, oak and spruce. The slug caterpillars have medial suckers instead of paired abdominal prolegs.