What is this soil digging insect?
Certainly not cicada killers--those have yellow stripes on them, are considerably larger, and also have a very different shape of abdomen. Here's a good pic of one of those: https://bugguide.net/node/view/1721236/bgimage.
They certainly look to have a hymenopteran &quot;waist&quot; so that means they aren't termites, they are some kind of winged ant. Possibly carpenter ants due to the large size (for ants) and the reddish-brown color (like this one https://bugguide.net/node/view/1056576/bgimage).