Western tree cricket - O. californicus
Described and named by Saussure in 1874
Western tree crickets have three color patterns: pale (green); pictipennis (similar to pine) and the pale brown form as seen here.
This is the pale green form.
This is another view of the pale green form of O. californicus. This individual was found on a juniper tree in Arizona.
Here is a view of the antennae.