The arrival of the steamer Georgia, on the 7th of September, put us in possession of later news from the Pacific coast of South America. In _Guayaquil_ a military outbreak, excited, so far as appears, solely by personal resentments, has resulted in a complete change of the administration. The President, Gen. Neuva, left Querto on the 17th of July for the purpose of visiting his family at Guayaquil. On approaching that city he was met by a military cavalcade, ostensibly for the purpose of escorting him in: but he was immediately seized by them, and hurried off to sea in a vessel lying in the river; the destination of the vessel, and the fate of the captive were unknown. Gen. Urbina immediately entered upon the administration of affairs. In _Chili_, Don Manual Montt has been elected President by an overwhelming majority. He was understood to be in favor of internal improvements and of a more effectual promotion of education. The Copiapo Railroad was to be opened in September. Congress was in session the last of July, but no important business engaged its attention. In 1850 the public revenue amounted to $4,334,314, and the expenditures to $3,610,837, including over three hundred thousand dollars remitted to England to pay interest on the loan contracted there. The whole English debt is now about seven millions of dollars. A very severe storm swept the harbor of Valparaiso in the early part of July. The damage to shipping, both Chilian and American, was very considerable. In _Bolivia_, the decree allowing foreign goods to be entered at a lower duty from vessels that had not touched at other ports, has been revoked. In _Peru_, Congress was still in session. The legislative and executive branches of the government are represented as being on the best of terms with each other, so that affairs are conducted with a good degree of promptness and efficiency. A bill has been urged in Congress for the greater extension of the freedom of trade, and another to prohibit the circulation in that Republic of Bolivian money. Several bills of decided local importance engaged the attention of Congress. There has been during the past year a very large export from Chili, chiefly of wheat and flour, amounting to two hundred thousand dollars more than during the previous year. In _New Grenada_, it is said there are new disturbances. The government levied a forced loan, and further decreed that the friends of the government should be exempted from its payment. In several provinces the decree had the effect of converting nearly the whole population into a government party; but in Bogota and Carthagena it had the opposite effect. Arrangements were in progress for an extensive revolt, and it was said that it had commenced at Bogota, but with what result is not clear.