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Hello Robert, you're right. I have seen the coxae too and intended to state: D. linearis, but my text did not come through correctly, this being my first intervention.
As with the face of the fly: it seems to be an abnormal development of the head in the pupa. It doesn't look like damage by some predator. If you have collected it, you should be able to see, if not it has died naturally! Regards, Jan.