nastos 的最愛

Found under a piece of wood. I think this may be Robertus vigerens based on similarity to this individual I found:
https://bugguide.net/node/view/729468

However I appreciate that these images may not be sufficient to be sure!

Update! I believe the epigynum images here are misleading. On looking at them closer, the two things that look like holes are actually spots where the epigynum is contacting the acrylic sheet I placed the spider under, and aren't part of the epigynum itself. The low resolution exacerbates the issue. The vaguely visible structure immediately below is what I think matches Kaston's figure for R. vigerens better, though it's still not clear enough for me to have confidence.

Now that I know this I'll take a different approach next time I find one of these.

Help! What is this beetle/bug? There seems to be an infestation or mass hatching around my house, outdoors. Small (up to 5mm), reddish brown with black markings near the head. Don't seem to be eating anything or mating and don't seem to bite. There are lots of them, possibly concentrated on the south side of the house. Possibly sexually dimorphic as there are some that are redder than others.