it also catches small birds; this latter I am inclined to question. One individual that we collected was twenty-two inches long, with an expanse of wings of thirty inches. The mouth when opened measured five inches from tip to tip of the bill, and was three inches wide; but the œsophagus was less than half an inch in diameter, which would prevent it from swallowing anything larger than a humming-bird. The nights at the mission were always pleasant. The priest usually conducted a short service in the chapel, and then we sat in front of his hut for an hour’s chat, while the children romped and played before being sent to bed. Sometimes one of the boys brought out a queer drum; the ends were made of skin taken from the neck of a jabiru stork. He beat it in slow rhythm, swaying his head from side to side with each low thud. The girls placed their arms around one another’s waists, forming lines of threes, and shuffled forward three steps and back, swinging their bodies all the while; suddenly they would whirl around once, take hold of one another’s hands, and then the long line swept around at such a rapid pace that the individuals at the ends invariably went sprawling some distance away. After tiring of this or any other pastime upon which they were engaged, they lined up and said a “_Buenas noches, Padre_,” in chorus. Then they ran away to the sleeping quarters. After spending nearly two weeks at the mission we accepted the priest’s invitation to accompany him on a short trip down the Chimoré. Twenty young men and boys were selected as paddlers; they started early one morning, taking all of our personal luggage with them; a large number of girls and women followed soon after, carrying baskets of plantains, yuccas, and other provisions. The missionary, Boyle, and I brought up the rear, and encouraged the few stragglers we met on the way, for the distance from the mission to the river is three miles, through the virgin forest. The Chimoré is of about the same width as the Chaparé, although the water is in normal times somewhat clearer. It rises far to the south and is formed by the junction of the Blanco and Icona. Some distance below it unites with the waters of the Ichilo, a mighty river flowing from the south, through a solitary and unknown wilderness, and up which Padre Fulgencio had ascended a number of miles on a previous trip. In latitude 15° 30´ South, the Ichilo and Chaparé join, and form the Rio Mamorecillo, which lower in its course is known as the Mamoré.