Neglect of their children, unsanitary habits and surroundings, tribal intermarriage and peonage are the principal causes of the decreasing Indian population.
To gamekeepers and those interested in the preservation of game, all animals such as the pole-cat, weasel, stoat, hawks, owls, &c., which destroy the eggs or young of preserved birds, are classed as "vermin," and the same term includes rats, mice, &c. It is also the collective name given to all those disgusting and objectionable insects that infest human beings, houses, &c., when allowed to be in a filthy and unsanitary condition, such as bugs, fleas, lice, &c.
Above the sea, and is celebrated for its agreeable temperature, and also for its healthiness in spite of prevailing unsanitary conditions.
The climate is healthy and agreeable, though the death-rate among the common people is abnormally high on account of personal habits and unsanitary surroundings.
There is a high rate of mortality among the natives, due to unsanitary habits and diet, and not to the climate.
The remaining native tribes under the supervision of the state have made little progress, and their number is said to be decreasing (notwithstanding the favourable climatic conditions under which most of them live) because of unsanitary and intemperate habits, and for other causes not well understood, one being the custom noticed by early travellers among some of the tribes of the La Plata region of avoiding the rearing of children.