Thank you, Tyler. He was my pet for over six months (adopted beginning of October), so I got a bunch of photos of him. He likes apples, lettuce, and his butterfly sponge.

Still alive and kicking as of 04.24.2022, a sweet little beetle who loves to bore into his apple slices.

I've wondered how long some of the larger dryophthorines live as adults.

Tyler, you were wondering how long these guys live. I adopted Calypso as a full adult on 10.06.2021, and she died today, 09.15.2023, after living with me for 23½ months (!). That is the longest I have ever kept an adult insect.

That's a heck of a run it had though! I wouldn't have expected it to live for anywhere close to that long, so that's very interesting.

My little angel, Calypso, adopted 10.05.2021, is still with me on 05.17.2023, and I love her dearly. (She might be a he -- I have no idea.) She enjoys her fresh carrot slices each morning.
Sadly, I have never been able to find another of her species. I even bought an agave plant hoping to attract them, but no luck. She's definitely very, very old, but still hanging in there. If she gets turned over onto her back, I have to set her upright, but she's fairly mobile and hangs out near the carrot slices and apple slices. She's in a cage with a few other small beetles -- she's the largest of the ones in the cage.
Her pet Sphenophorus, adopted 11.08.2022, is still with me, as well: