Despite the abdication of a large part of the Dáil , the Provisional Government ( Rialtas Sealadach na hÉireann ) of the new Free State was formed , with Arthur Griffith as President of the Dáil , and Michael Collins Chairman of the Provisional Government Cabinet ( i.e. , Prime Minister ) .
The new Provisional Government ( Irish : Rialtas Sealadach na hÉireann ) was formed under Collins , who became `` President of the Provisional Government of Southern Ireland '' ( i.e. , Prime Minister ) .