It is a beetle, not one I am familiar with. Not sure why they would be on their backs unless falling from a vertical or elevated surface. These beetles would not be acting dead, they are out of their element and perhaps near the end of their lifespan, unless they are in a cold room, that would make them lethargic.

A dozen of these are not a concern, as they are not beetles such as bedbugs, carpet, or larder beetles that would eat things in the household.

It rather looks like a round head or long horn borer of some sort. They can find their way inside via firewood, and lumber. I should say that the white larvae find their way in....deep inside the wood. They develop into adults and emerge as beetles.

There's one species called the 'old house borer'.

It is ALWAYS helpful to know where on the planet you are and the approximate size of this beetle.

@rhizo_1 Sorry for leaving out details - about 1 inch long, in PA. Showed up a few weeks ago as the weather got warmer. If these are borers deep in wood, is that a problem for the house which includes wood?

No. The wood in your house is too dry.

The beetle is a longhorned beetle. In the family Cerambycidae.

BTW, firewood was mentioned. Do you have any indoors? IF not, how about a wood pile, probably near the house.

Hi Jean,

Yes we have 2 or 3 giant stumps of wood (3 foot diameter) sitting in the house as a decoration/stool waiting to be turned into something furniture-ish. Collected post-Hurricane Sandy. We let it dry for 2 years before bringing inside, but I guess that is where they are coming from. Maybe it is time to strip the bark and seal the wood.

Thanks,

-k.