I had posted this on iNaturalist at about the same time, and just yesterday a beetle specialist identified this as Baliosus nervosus
https://inaturalist.ca/observations/62942183
As I am not a beetle expert by any means, I defer to the experts but this presents a dilemma. There were quite a few of these critters, and all were on American Beech.

Any thoughts?

to me yours looks more elongate than most of the ones in B. nervosus but I'll have to defer to the experts here.

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Sumitrosis has 8 to 8.5 rows of punctures while Baliosus has 10 to 10.5. I'm not positive how to count the punctures but comparing yours to photos I've had IDed from specimens of the two genera the intervals do seem to match those of Baliosus.

...I checked A. A. Evans Beetles of E NA book and it indicated that Sumitrosis has a small groove in the middle of the head, whereas Baliosus doesn't. While that part of my image isn't as sharp as it might be, it doesn't appear to have any type of small groove, but a more rounded appearance, suggesting Baliosus. Unfortunately I only had a good quality Canon zoom lens, with a reasonable macro focus but not my high quality Canon macro lens, and even at that, this image had to be cropped quite a bit. Therefore the top of the head isn't in the sharpest focus.

I noted that in some of the reference material, but then checked various images of each here on BG and saw that often there wasn't much difference in pale vs dark between the two species. This individual isn't really dark or pale, but somewhere in between, so I am uncertain and need a more expert opinion.