young Cicadellid of some kind? - Thamnotettix zelleri
Willow Springs, San Benito Co., CA; 36.66700°N, 121.03110°W; 2805 ft. elevation., San Benito County, California, USA April 22, 2012 Size: ~5mm length
This little guys "appeared" in front of me while I was photographing Ranunculus californicus, so I grabbed the 65mm macro and got a photo of him before he disappeared. I'm guessing it is some kind of young Cicadellid.