Insect and Spider Identification: Winged Pest Identifier, 1 by sacgurl

sacgurl wrote:
Hello everyone, so happy to find this thread! About three days ago hundreds of winged (flies?) appeared in my yard in several areas. Brown, no longer than small fingernail, wings slightly longer than body, wasp-like waist, six legs (i think), nesting in the ground (soil fairly dry), away from house. They don't bite, but I'm insanely curious as to what they may be. Doesn't look like termite, or fungus gnat. I'm posting a pic, and hope you can help. You may have to zoom in for detail. Thank you!