What on earth is this?
We really don’t want to do anything to encourage identification requests like yours, devoid of helpful information, so we will request that you return to the site to get your answer. These are mating Wheel Bugs, a species of Assassin Bug, and they are highly beneficial insects that devour quantities of harmful garden insects. We absolutely love the photograph.
Sorry. Additional info: These were located on my deck railing in the Eastern Panhandle of West Virginia. We live in development that used to be an old orchard. Many of the orchard trees still exist and these photos were taken directly under a black walnut tree which catapillars recently ravaged. So, hopefully these little ‘assassin’ gems are getting their fill !!! Thank you for you help.