abling it to grasp firmly the branches of trees. This is a distinguishing character of all the birds in equinoctial America which represent the fowl and pheasant tribes of the old world, and affords another proof of the adaptation of the Fauna to a forest region. The Cigana lives in considerable flocks on the lower trees and bushes bordering the streams and lagoons, and feeds on various wild fruits, especially the sour Goyava (Psidium sp.). The natives say it devours the fruit of arborescent Arums (Caladium arborescens), which grow in crowded masses around the swampy banks of lagoons. Its voice is a harsh, grating hiss; it makes the noise when alarmed, all the individuals sibilating as they fly heavily away from tree to tree, when disturbed by passing canoes. It is polygamous, like other members of the same order. It is never, however, by any chance, seen on the ground, and is nowhere domesticated. The flesh has an unpleasant odour of musk combined with wet hides—a smell called by the Brazilians catinga; it is, therefore, uneatable. If it be as unpalateable to carnivorous animals as it is to man, the immunity from persecution which it would thereby enjoy would account for its existing in such great numbers throughout the country.
A great number of the insects which we found here were different from those of Pará. Species characteristic of the one locality were replaced by allied species in the other, a fact which would tend to the conclusion that the Tocantins serves, to some extent, as a barrier to migration. This was especially the case with the Papilios of the group which wear a livery of black,
