I found this strange small beetle near fresh cut Douglas fir tree. It was flying under poring rain and once I brought it in house (dry environment) the beetle died in next hour or so. So, I'm pretty confident this species is very dependable on wet environment. Under microscope I find out that my specimen has a mutation (see its left fore leg on very last picture).
The antennae structure and general shape make me feel this is a member of Cucujoidea superfamily, possibly Cryptophagidae, but I can't get any dipper with ID.
That would be awesome to get any other opinion or possibly even the species ID. Thanks for any help!