MAYO is a small district to the south of Hiaqui, and is bounded by that province on the north, on the east by the ridge of mountains, on the south by Sinaloa, and the west by the gulf of California. Of it very little is known with accuracy; it is fertile, aid watered by the river Mayo, from which it receives its name; this river falls into the Californian sea in north latitude 27° 40ʹ. SINALOA OR CINALOA. SINALOA is the most southern province which is comprehended under the intendancy of Sonora; it is bounded by the gulf of California on the west, on the east by New Biscay, or the ridge or Cordillera of Topia, also called Tepecouan, and Sierra Madre, on the north by Mayo, and on the south by Culiacan. This country is about 300 miles in length from the south-east to the north-east, and 120 miles broad. Sinaloa was discovered by Nunez de Guzman in the year 1552. The climate is good, the air being very pure, the land fertile, and producing abundantly grain, cotton, and fruits. The rivers are numerous, though small, and well stored with fish. Sinaloa is chiefly inhabited by Indians, though there are numbers of mining stations established; and the province bids very fair to be well colonized. The natives are a warlike race, and were with great difficulty brought to submit to the dominion of the Spaniards. They have caciques or chiefs, whose authority is however very limited, being confined to heading warlike expeditions. It is chiefly by valour displayed in battle, or hunting, that they obtain this distinction; sometimes indeed the interest of a powerful family elevates one of their number to the caciqueship. They are fond of oratory, and if one of their number displays any great ability in this art, universal acclamations decree him their chieftain. These latter instances are however rare. Laws are unknown. Their weapons are bows, with poisoned arrows, heavy clubs of wood and shields. These people are more industrious than their Californian neighbours in manufacturing coarse cotton stuffs. Many of the tribes subsist entirely by hunting and fishing, and have no regular residences, neither do they till the ground. In the inland parts these tribes are chiefly found subsisting by the chase; on the sea coast they live by their industry, and by the fishery.