Each family has a separate house, which is small, of a square shape, and possesses both a door and windows; and the houses are collected together in little scattered villages. The Isánna Indians make small flat baskets like those of the Uaupés, but not the stools, nor the aturás, neither have they the white cylindrical stone which the others so much esteem. They marry one, two, or three wives, and prefer relations, marrying with cousins, uncles with nieces, and nephews with aunts, so that in a village all are connected. The men are more warlike and morose in their disposition than the Uaupés, by whom they are much feared. They bury their dead in their houses, and mourn for them a long time, but make no feast on the occasion. The Isánna Indians are said not to be nearly so numerous, nor to increase so rapidly, as the Uaupés; which may perhaps be owing to their marrying with relations, while the former prefer strangers.

The Arekaínas make war against other tribes, to obtain prisoners for food, like the Cobeus. In their superstitions and religious ideas they much resemble the Uaupés.

The Macás are one of the lowest and most uncivilised tribes of Indians in the Amazon district. They inhabit the forests and serras about the rivers Marié, Curicuriarí, and Urubaxí, and live a wandering life, having no houses and no fixed place of abode, and of course no clothing; they have little or no iron, and use the tusks of the wild pig to scrape and form their bows and arrows, and they make a most deadly kind of poison to anoint them. At night they sleep on a bundle of palm-leaves, or stick up a few leaves to make a shed if it rains, or sometimes, with "sipós," construct a rude hammock, which, however, serves only once. They eat all kinds of birds and fish, roasted or boiled in palm-spathes; and all sorts of wild fruits.

The Macás often attack the houses of other Indians situated in solitary places, and murder all the inhabitants; and they have even depopulated and caused the removal of several villages. All the other tribes of Indians catch them and keep them as slaves, and in most villages you will see some of them. They are distinguishable at once from the surrounding tribes by a wavy and almost curly hair, and by being rather lanky and ill-formed in their limbs: I am inclined, however, to think that this latter is partly owing to their mode of life, and the hardships and exposure they have to undergo; and some that I have seen in the houses of traders have been as well-formed and handsome as any of the other Indian tribes.

The Curetús are a nation inhabiting the country about the river Apaporís, between the Japurá and Uaupés. I met with some Indians of this tribe on the Rio Negro, and the only peculiarity I observed in them was, that their cheek-bones were rather more prominent than usual. From them, and from an Isánna Indian who had visited them, I obtained some information about their customs.

They wear their hair long like the Uaupés, and, like them, the women go entirely naked; and they paint their bodies, but do not tattoo. Their houses are large and circular, with walls of thatch, and a high conical capped roof, made like some chimney-pots, with the upper part overlapping, so as to let the smoke escape without allowing the rain to enter. They do not wander about, but reside in small permanent villages, governed by a chief, and are said to be long-lived and very peaceable, never quarrelling or making war with other nations. The men have but one wife. There are no pagés, or priests, among them, and they have no ideas of a superior Being. They cultivate mandiocca, maize, and other fruits, and use game more than fish for food. No civilised man has ever been among them, so they have no salt, and a very scanty supply of iron, and obtain fire by friction. It is said also that they differ from most other tribes in making no intoxicating drinks. Their language is full of harsh and aspirated sounds, and is somewhat allied to those of the Tucanos and Cobeus among the Uaupés.

In the lower part of the Japurá reside the "Uaenambeus," or Humming-bird Indians. I met with some of them in the Rio Negro, and obtained some information as to their customs and language. In most particulars they much resemble the last-mentioned tribe, particularly in their circular houses, their food, and mode of life. Like them they weave the fibres of the Tucúm palm-leaf (Astrocaryum vulgare) to make their hammocks, whereas the Uaupés and Isánna Indians always use the leaf of the Mirití (Mauritia flexuosa). They are distinguished from other tribes by a small blue mark on the upper lip. They have from one to four wives, and the women always wear a small apron of bark.

Closely allied to these are the Jurís of the Solimões, between the Iça and Japurá. A number of them have migrated to the Rio Negro, and become settled and partly civilised there. They are remarkable for a custom of tattooing in a circle (not in a square, as in a plate in Dr. Prichard's work) round the mouth, so as exactly to resemble the little black-mouthed squirrel-monkeys (Callithrix sciureus); from this cause they are often called the Juripixúnas (Black Juris), or by the Brazilians "Bocapreitos" (Black-mouths). From this strange errors have arisen: we find in some maps the note "Juries, curly-haired Negroes," whereas they are pure straight-haired Indians. They are good servants for canoe and agricultural work, and are the most skilful of all in the use of the gravatána, or blow-pipe.

In the same neighbourhood are Miránhas, who are cannibals; and the Ximánas and Cauxánas, who kill all their first-born children: in fact, between the Upper Amazon, the Guaviare, and the Andes, there is a region as large as England, whose inhabitants are entirely uncivilised and unknown.

On the south side of the Amazon also, between the Madeira and the Uaycáli, and extending to the Andes of Peru and Bolivia, is a still larger tract of unknown virgin forest, uninhabited by a single civilised man: here reside numerous nations of the native American race, known only by the reports of the border tribes, who form the communication between them and the traders of the great rivers.