Comprehends several minor districts, of which Caxatambo, Huamalies, Conchucos, and Huailas, are the principal. It is bounded by Truxillo on the north, the Pacific on the east, the Apurimac on the west, and Lima and Guanca-Velica on the south. On the sea-coast its climate is hot, but in the interior it varies, according to the height of the land. We shall not follow the minute divisions of this province, as we have done those of Truxillo, on account of its being the boundary between New Granada and Quito, merely describing the chief towns and the country in their neighbourhood. Tarma contains the sources of the Xauxa and Guallaga rivers, the former of which falls into the Apurimac. The _Juaja or Xauxa_ rises in the little lake of Chinchay Cocha, in about eleven degrees south latitude, and after a long and precipitous course, it throws itself into the small river Mantura, by which it joins the Apurimac. The _Guallaga_ rises a short distance north of the Xauxa, in a little lake, called Chiguiacoba, on the opposite side of the mountains, which form the Cerro de Bombon, whence it flows north, receiving several rivers, till it passes the town of Guanuco, when it becomes very rapid, and receives the Monzon from the west, in 9° 22' south latitude, after which, it follows its original course, and becomes more tranquil. At 7° 10' it receives the Moyobamba, and after this, four dangerous rapids present themselves before it reaches Ponquillo at the foot of the mountains. Its breadth is now 1200 feet, and running through the province of Maynas; at 5° 4' south latitude, it falls into the False Maranon, being 450 yards wide, and 34 deep. At the confluence, the Guallaga is divided into two branches, and a lake is formed half a league in breadth and 70 fathoms deep. During the course of a league, the two rivers seem of equal force, but at length, the Tunguragua overcomes the Guallaga. The banks of this fine river are clothed with beautiful trees, enlivened with a great variety of birds, and one tree produces a sort of tallow or grease, which is used by the natives for the same purposes as candles. Besides these, the beautiful river _Pachitea_ rises in Tarma, in 10° 46', on the east-side of the Andes, first running east, then north, and called the _Pozuzo_ at its confluence with the Mayro, where it forms a fine haven, from which there is a direct and open navigation to the Maranon, which it joins in 8° 46' south latitude.