STAMFORD — Linda Costis is the newest member of the Board of Representatives. Costis, sworn in at the Feb. 6 board meeting, replaces Valerie McNeil in the 9th District. A move from the district forced McNeil, a Democrat, to resign her seat. Costis, also a Democrat, will serve until the November municipal election, at which point she will need to run to keep her seat. She represents the 9th District alongside Democrat Rodney Pratt.