Hopper on Common Milkweed - Agallia quadripunctata
Near Ruraldale, Upshur County, West Virginia, USA June 8, 2006
Genus Agallia, or maybe Agalliopsis with that ridge or discontinuity where head meets pronotum?
Hard to photograph because he loved the "squirreling" trick of going to the opposite side of the trunk from where I was. Cicadellidae seem to love doing that.