near Edinburg, 20 miles north, rural - this is south Texas, Hidalgo County, Texas, USA May 14, 2014 Size: honey bee size
There were several clusters rolling around in an area with many small (more or less 1/2 inch) burrow opening into bare, dry sandy soil within a road. I wondered if they were competing for prey, mates or insects into which they would lay eggs. These looked similar to something identified as a beefly parasitoid in as early ID request.