Cicindela rufiventris cumatilis
A few days ago I went to lake Stanley Draper in central Oklahoma. While hiking along an old dirt road about 50 yards from the lake I found this beautiful blue tiger beetle. This was the smallest of the tiger beetles I found, probably only 1cm long.
I posted these photos on BugGuide where they were identified as Cicindela rufiventris cumatilis. I checked the underside and it is bright red, so I think this ID is correct.