I photographed a few of these this summer. They came to lights at night. At first I thought that they were Nicrophorus pustulatus, but on looking closer I am convinced that they are not. I have looked at all the sexton beetles in BugGuide, and did not find any with the ridges on their elytra. Also, there is no orange on their antenna. They do have orange spots near the end of their elytra, and one had a small orange spot near the outside edge, much like N pustulatus. Any help you can give with identification will be appreciated. Photographed at 22:33.