United States (USA) - Missouri between approximately 91°45'W and 93°35'W - counties of Adair; Audrain; Benton; Boone; Callaway; Camden; Carroll; Chariton; Christian; Cole; Cooper; Dallas; Douglas; Greene; Grundy; Hickory; Howard; Howell; Knox; Laclede; Linn; Livingston; Macon; Maries; Mercer; Miller; Moniteau; Monroe; Morgan; Osage; Ozark; Pettis; Phelps; Polk; Pulaski; Putnam; Randolph; Saline; Schuyler; Scotland; Shelby; Stone; Sullivan; Taney; Texas; Webster; Wright.