Two members of a family that the authorities say once tried to set up a whites-only nation were arrested this week on firearms charges after a raid on a 40-acre ranch netted dozens of weapons and thousands of rounds of ammunition. Kirby Kehoe, 65, and his son, Cheyne, 37, had an initial court appearance Tuesday in Flagstaff. The authorities received a tip that Kirby Kehoe had weapons on the property near Ash Fork, about 140 miles north of Phoenix, said Tom Mangan, a special agent with the federal Bureau of Alcohol, Tobacco, Firearms and Explosives. The Kehoes have previous felony convictions and are banned from possessing firearms. The family has been well-known to law enforcement since the 1990s when the authorities say they provided weapons to white supremacists who committed robberies across the Midwest.