Oecanthus niveus (Narrow-winged Tree Cricket).
Size: approx. 20 mm. Photo: 06/18/14, noon.

I found this nicely camouflaged tree cricket underneath an oleander leaf. Most of these species can be identified by inspection of the first two antennal segments. This one has a characteristic orange patch on the head and translucent limbs, strongly suggesting O. niveus. Tree cricket nymphs are essentially small versions of the adults with external wing buds. 

bug guide (this photo):
Nancy Collins (great information):