Leafhopper (Xestocephalus) <4mm 2012-9-8 PL, DE

Dr. Andy says here:
http://bugguide.net/node/view/147509/bgpage
"This is an ant-guest leafhopper that flies actively in search of holes in the ground, so it is unlikely that you would find it on plants."

for more on ant associations with other organisms (Myrmecophily) see:
https://en.wikipedia.org/wiki/Myrmecophile