ID bug found in Mojave county, USA
Initial guess based on mouthparts, coloration and small size:

Neuropteran larva. Possibly a green lacewing (family Chrysopidae). 

See:



 Source: Bugguide.net 



 Source: Cedar Creek Ecosystem Science Reserve 

According to here, green lacewings are found in Arizona deserts. 

I will update in the morning with more detail...