In all suits in personam, if either of the sureties shall become insolvent pending the suit, new sureties may be required by the order of the court to be given, upon motion and due proof thereof.  In all cases not provided for by the rules, the district and circuit courts are to regulate the practice of said courts in such manner as shall be deemed most expedient for the due administration of justice in suits in admiralty.[i]

[i] The City of Hartford, 11 F. 89 (D.N.Y. 1882)