The Russian forces between the Lower San and the Vistula have retired at several points. The heights north of Cieszanow (ten miles north of Lubaczow) have been taken. In the mountainous region east of Niemirow and in the rear of Jaworow, strong Russian forces have appeared. On the Wereszyca River the fighting continues. Our troops have gained a footing at some points eastward of the river. South of the Upper Dniester the Russians, after hard fighting, were compelled to retire from positions near Litynia toward Kolodrub. Our pursuing troops have reached the mouth of the Wereszyca. Elsewhere the situation along the Dniester is unchanged. [Illustration: The dotted line shows the approximate position of the Austro-German battle line in the middle of February, when the drive at Lemberg, supported with enormous reinforcements which had been concentrated at Cracow, began. The heavy black line shows the approximate position of the victorious armies bent on driving the Russians out of the corner of Galicia still remaining in their possession. The frontier is indicated by the line of dots and dashes.] The eastern groups of General Pflanzer's army yesterday repulsed three Russian storming attacks. The enemy making desperate attempts to throw our troops back in Bukowina, suffered heavy losses from our artillery and retired quickly. Eight officers and 1,000 men and three machine guns were captured. GRODEK POSITION CAPTURED. _BERLIN, (via London,) June 20.--The armies under General von Mackensen are continuing their advance upon Lemberg, the Galician capital, after capturing Grodek, and have taken Russian trenches, one after another, along a front of almost twenty-four miles to the northwest of the city, where the Muscovites are making a desperate stand, according to a statement issued today at the headquarters of the German Army Staff. The statement says:_ Eastern Theatre--Russian attacks against our lines in the vicinity of Szawle and Augustowo were beaten off. Our advance in small divisions resulted in the capture of advanced positions of the enemy near Budtbrzysieki and Zalesie, east of the Przasnysz-Myszyniec Road. Southeastern Theatre--South of the Pilica, troops under General von Woyrich have taken several advanced enemy positions during the last few days. The armies under General von Mackensen have taken the Grodek position. Early yesterday morning German troops and the corps of Field Marshal von Arz commenced an attack upon strongly intrenched enemy lines. After stubborn fighting, lasting until afternoon, enemy trenches, one behind the other, almost along the entire front, extending over a distance of thirty-five kilometers (twenty-four miles) north of Janow (eleven miles northwest of Lemberg,) Bisputa, and Obedynski, and southeast of Rawa Ruska, (thirty-two miles northwest of Lemberg,) had been stormed. In the evening the enemy was thrown back behind the high road to Zolkiew, north of Lemberg and Rawa Ruska.