I have also photographed this species covered in mites at my house... but it is so neat to be able to see what the wings look like extended. I agree that the location of those mites could not be any more symmetrical or perfect-looking. Jim's explanation for their placement is really truly fascinating. Thanks for capturing these images!

is their preferred riding location when the beetle is flying. The mites can detect when the beetle is contemplating flight and you can see them scamper up onto the middle of the elytra, facing forward like this. When flying, Nicrophorus beetles rotate their elytra in toward each other, forming a protective tent with the mites inside. I think they must stand the least chance of being dislodged in that position.

On this beetle, once the wings were folded away, the mites no doubt headed back down to the undercarriage where they normally ride.

Those two mites are so perfectly placed they look like they're part of the beetle's pattern/coloration. Great photo!