LARGO — Police have arrested a man who they say has robbed two Largo banks in the past six weeks. The latest robbery was at 12:53 p.m. at the Fifth Third Bank at 11281 Ulmerton Road, according to the Largo Police Department. Armed with a knife, Ronald J. Massey, 30, entered the bank and demanded money, Largo police said. He fled on foot with an undisclosed amount of cash. Massey has been charged with armed robbery in connection with the incident. He has also been charged in connection with the robbery of the BB&T bank at 14141 Walsingham Road in Largo on Dec. 14, police said.