This was a recent article done by investigative journalist Milton J. Valencia after extensive interviews with the Feds:

http://www.boston.com/news/local/massachusetts/articles/2012/05/08/new_england_mafia_fades_away/

This investigative piece says no more than 30 members and that is not taking into account Mannocchio (IP), Lato (IP), DeLuca (IP), St. Laurent (IP), Marapese (IP), Ruggiero (not active), Gugliemetti (IP), Rossetti (IP), Limone (federal monitoring), Cheeseman (IP), Fat Anthony (IP), Prochilo Jr. (IP), Darren Bufalino (IP), Scivola (IP), DelSanto (not active), Junior Patriarca (not active), Rudy Sciarra (deceased), Vito DeLuca (not active-outcast) etc...All these names are calculated into their "estimated" membership totals. Here are 18 members who really have no role in LCN currently and who will be on federal monitoring once released...and guys like Manocchio, Lato, Marapese, Scivola and St. Laurent may die in prison.