Late BulletinsROME, May 21 (AP) Premier Mussolini today had a long talk with the German colonial chief, General Ritter von Epp.LONDON, May 21 (UP)The British expeditionary force today is fighting to hold its only channels of retreat in north France the ports of Calais, Boulogne and the ports of Ostend and Blankenberghe in Belgium.PARIS, May 21 (UP) A French military source said tonight that fighting still was raging furiously in the Cambrai region despite the enemy breakthrough to Amiens and Arras and that Generalissimo Maxine Weygand was at the battle front issuing orders designed to correct what Premier Paul Reynaud, before the senate, had called incredible faults.PARIS, May 21 (AP)Small detachments of German motorcycle troops have penetrated in the outskirts of the Abbeville region, near the English channel, a French spokesman admitted tonight.LONDON, May 21 (AP)The Duke of Gloucester, brother of King George VI, was disclosed tonight to be suffering from cuts caused by bomb explosions on the Franco-Belgian front. Both hands also are badly bruised. For three successive nights the duke was in areas which were heavily bombed.WASHINGTON, May 21(UP) The house military affairs committee voted unanimously today to report a bill lifting present restrictions hampering quick expansion of the army and lifting all limitations on the number of airplanes that may be built in the next fiscal year.PARIS, May 21(UP) Tonight's war communique said the Germans had continued their push north of the river Sororae and that German advance elements had reached Amiens and Arras.