This method of healing was unknown to us in Paraguay. The next to this in noxious qualities is a snake twelve, and sometimes fifteen feet long, with a large body the colour of ashes, varied with little black spots, yellowish under the belly, and formidable on account of a peculiar poison it contains and introduces with its bite. The Brazilians call it Cucurucù, the Guaranies Mboy̆pè guazù; and from its effects I guess it to be the same as that which Pliny calls Hæmorrhoam, and others Hæmorrhoida. This snake is most abundant where heat and moisture, the generators of serpents, predominate. Its poison heats the veins, and expels the ebullient blood from the mouth, nose, ears, eyes, finger-nails, in a word from all the outlets and pores of the body. This is related by Patricio Fernandez, who asserts that few persons are killed by this serpent, because most part of the poison flows out with the blood itself. For my part I never saw any serpent of that kind, nor any person that had been bitten by one, though I understand that they are not unfrequent in Brazil, where the Indians apply the head of the serpent to the wound it has inflicted, by way of a cataplasm; fresh tobacco leaves slightly burnt are used for a cautery. The roots also of the Caapia, Jurepeba, Urucù, Jaborandy̆, &c. are used to create perspiration. They say that, when the head of this serpent, in which greatest part of the poison lies, is cut off, the flesh is eaten by the savages of Brazil. In Paraguay, besides the Mboy̆pè guazù, you meet with the Mboy̆pè mir̂i, which is scarce thicker than a quill. Though smaller, it is more poisonous than the larger serpent of the same name.