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Family Cerambycidae
This nicely coloured beetle lost one of its elytra, and had a damaged wing. In the last photo of this series it is possible to see it unsuccessfully trying to take off.
I think, maculicollis instead of T. pustulata:
https://apps2.cdfa.ca.gov/publicApps/pla...
because in the latter, no specimen seen in which pattern reduction leaves only the median band yellow.