Wildlife Spotting

Exoskeleton of what appears to be a bee. Reminiscent of cicada exoskeleton left on trees in Washington, DC, with same white "hairs" along split. Two sited on Mt Tam. Second one was adjacent to what appears to be a den of all scorpions. See them in the crack of the wood. What is this bee-like thing that either molted or was eaten internally by a parasite before it left the host, splitting open and melting? Reminds me of a potential cicada killer wasp attack, paralyzing this insect and laying an egg in its body. Larva then feed off bee's innards, turn into something else and exit host's body. Help.