The local name for all kinds of termites was cupim, but technically they are known in the Order of Neoroptera as Termes album. Another variety of insect, the Psocus domesticus, was also as destructive as the Termes album.

We frequently met with plants of caju, or acaju or acajueiro (Anacardium Occidentale L.) on our course. They belonged to the Terebinthaceæ group. In a preceding chapter I have already described the red or yellow delicious fruit of this tree. Then we found other interesting trees, such as the oleo, the tall and handsome poinna, and numerous specimens of the small but good-looking palm pindova.

There were not many flowers in that particular spot, barring perhaps an occasional cluster of white flowers, principally bocca de carneiro, said to have properties refreshing for the blood.

Near a small stream I noticed some lovely, slender, tall jeguitiba vermelho trees (Couratari estrellensis Raddi), from 75 to 80 ft. high, with branches and clusters of deep green healthy leaves at the summit only.

There was a little less monotony in the scenery before us that day, for to the west stood, over a long, slightly undulating line, one peculiar conical hill heavily wooded. In pools of stagnant water were lovely water flowers, and in the neighbourhood of that moisture many handsome burity palms were prominent in the landscape.

We had been mounting gently all the time from our last camp. Early in the afternoon we reached that magnificent river, the Araguaya, over 200 yards wide, although something like between 2,500 and 3,000 kil., or perhaps more, from its mouth. Its lovely placid waters, reflecting with the faithfulness of a mirror the vegetation on the high steep banks as well as the clouds in the sky, made an effective picture. The dead silence, disturbed only by the shouts of my men urging the mules to the water-side, was most impressive, the water flowing so slowly that it almost looked stagnant.

Not a mountain, not a hill could be perceived, except one low humble range of hills to the south. It was on those hills that the great Araguaya had its birth.

We crossed the great stream—mules, baggage and all, on three canoes upon which a platform had been erected. Once landed on its western bank, we were, notwithstanding local boundary quarrels, in the immense State of Matto Grosso, the wildest of Brazil.