Length: 2.6-3.1 mm
In their 1996 article, Zimmerman et al. reported on certain aspects of the life history of Erythroneura vulnerata in Colorado. They noted that the species has two generations per year in that state. Both adults and nymphs feed on the upper surface of grape leaves. The authors estimated that each nymph damages 1.3 square centimeters of grape leaf.
American Insects site