I was happy to find more information of the statue of an actor disguised as Papposilenos, the oldest member of the band of satyrs who raised Dionysos. I saw the statue last year in the Palazzo Massimo all Terme in Rome.
The Papposilenos served as the chorus leader in the satyr play because in a sense he was the least vulgar. To some extend, Hart explained, he mitigated the obscenity and crudity of the other players as he paraphrased the heroic themes proper to tragedy.
The Roman statue dates from the 2nd century AD and was found in 1957 on the beach of Torre Astura, near a Roman villa. It is 94 centimeter high and made of white marble. It is one of the nicest statues I have found of actors until now.