Moved from Timema.

The clear pattern of the dorsal stripes here would lead me to think this is probably T. poppense. But, since this is a female, it might also be the parthenogenetic "look-alike" species associated with T. poppense, namely T. douglasi.

Both those species use Douglas fir and/or redwood as host plants. Douglas fir is pretty common in wild parts of the Fairfax area, often growing with redwoods. And both of those are often not far from oaks, toyon, ceanothus, or manzanita, which are all hosts of the T. californicum in your other post:



So figuring out the host for a Timema in that area can be tricky, unless you actually see it feeding on the given plant (and they usually feed at night). I had a similar difficulty with in a post from the Santa Cruz Mnts below:



By the way, although the green legs here do differ from the yellowish legs (with dark brown femora) in your other post of T. californicum...that alone does not eliminate T. californicum. That's because the females of that species appear to have green legs, and the males yellowish-brown legs, as seen in the post below:



Also, I think color characters like that may sometimes be misleading in Timema, due to variability within species. So it's best to go by the terminalia, in conjunction with other characters (host plant, location, markings, coloring, etc.) when possible.

Moved from ID Request.