Gypsonoma haimbachiana
Reference: MPG
Reference: BugGuide.Net
Reference: Wikipedia

Supported at the Gypsonoma genus level by DNA barcoding, BOLD LPOKE034-10
Match to G. haimbachiana is off by 2.2 % but probably just a regional difference with the Canadian reference specimens.
This specimen is shown here: BOLD:AAH5147
Bartlesville, OK