See here for images of adults of this species: 1, 2.
Nymphs are greenish or brownish in color, but note the bold, distinctive white stripe down the body; this white stripe allows teh nymph to mimic the underside of a hemlock needle.
There are collection records from sites in the Piedmont and Coastal Plain where hemlock is not found, and it is therefore likely that these records are misidentified or mislabeled. These records have not been entered on this site.