The State of Mechoacan is extraordinarily rich in rivers and streams. The Lerma, Balsas, Zitacuaro, Huetamo, Cluranúeco, Marquéz, Aztala, Tlalpujahua, and some smaller streamlets and brooks are found in its vallies; while the lakes and ponds of Cuizco or Aaron, Patzcuaro, Huango, Tanguato, and Huaniqueo afford supplies to numerous neighborhoods. The climate of Mechoacan is regular, not liable to extraordinary or sudden changes, and remarkably genial. On the Pacific coast and in its vicinity, as in the other middle and southern States of the Confederacy, agues and intermittent fevers prevail; but the population seems to have increased considerably since the beginning of this century, and even in a larger proportion than in some other parts of Mexico. In 1849, the number of inhabitants was estimated to be not less than 590,000. Three Indian tribes still dwell within its borders: 1st, the Tarascos; 2d, the Otomies; 3d, the Chichimecas. The whole southern half of the State is peopled with Indians. * * * * * Mechoacan is divided into 4 departments and 62 municipalities: 1. Department del Norte, with 14 municipalities. 2. " del Oriente, with 15 municipalities. 3. " del Sur, with 11 municipalities. 4. " del Poniente, with 22 municipalities. These 4 departments contain the three cities of MORELIA, PATZCUARO, and TZINTZOUTZAN;--the three towns of Zitacuaro, Zamora, and Charo;--256 villages, 333 _haciendas_, and 1,356 _ranchos_, which are divided among 83 parishes. The agricultural productions of Mechoacan are similar in character to those of the other Western States of Mexico lying within the same longitude. The best sugar plantations are about 12 leagues from Patzcuaro. At the foot of Jorullo, cotton, indigo, cacao and sugar are planted; and mainoc or cassava, potatoes and yams are sown in genial spots, whilst maiz, wheat, barley and magueys are cultivated in the higher and cooler regions. The finest tropical fruits are raised in the warm portions of the State. The capital of Mechoacan is Morelia, sometimes called Valladolid, or Valladolid de Mechoacan. Its modern title is derived from the name of the insurgent leader Morelos. MORELIA lies 6,398 feet above the level of the sea, in latitude 19° 42´ North, 103° 12´ 15´´ W. long. from Paris,--between the two streams which water the Valley of Olid. It is a small, but handsome town, possessing some fine churches, and a charming passeo and alameda. The climate is mild and wholesome, but snow falls occasionally during the winter. PATZCUARO lies on the south-eastern bank of the lake of that name.