"Leafhoppers have piercing-sucking mouthparts, enabling them to feed on plant sap. A leafhoppers' diet commonly consists of sap from a wide and diverse range of plants, but some are more host-specific. Leafhoppers mainly are herbivores, but some are known to eat smaller insects, such as aphids, on occasion. A few species are known to be mud-puddling, but as it seems, females rarely engage in such behavior." Wikipedia: http://en.wikipedia.org/wiki/Leafhopper
Grasslands / fields / woods.
I saw one of these little guys last night as the sun was setting and by the time I got my camera it had moved on. This afternoon to my surprise I found several of them feasting on the milkweed plants growing in the back field, and was able to get a shot. This is by far not a clear macro as it's enlarged several hundred times via photoshop. The second photo is the original, to give you a sheer scale of how small these guys are. Really, really neat coloration.