"Looks like some sort of hopper nymph; ID help needed. ~5 mm. On Common Milkweed, woodland margin. Aha! BugGuide search on ""leafhopper nymph"" suggested that that was the right hopper ballpark, then ""leafhopper milkweed"" turned up a palpable hit: http://bugguide.net/node/view/482317. Posted mine to BugGuide; ID confirmed by Andy Hamilton."