I'm cheering for the mosquito this time! These large flies were impossible to escape, even on high mountain slopes with a good wind. Their bites were painful and left a good-size welt, but this one seemed to have a biter of its own. The mosquito stayed on its back and appeared to be feeding on it.
Albino plethodon species, possibly Western Red-backed (Plethodon vehiculum) a common species in this area.
~50mm SVL
~45mm Tail Length
16 Costal Grooves (from what I can tell)