On the second search, however, we took with us an assistant, Mr. Lee S. Crandall. By his assiduity in trapping and in arousing the interest of native coolie and black boys, he assembled a splendid collection of almost three hundred living birds of fifty-one species. These we brought to the New York Zoölogical Park, where no less than thirty-three species were new to the collection. In addition many small mammals and reptiles were collected. PART I. We left New York on February 22d, 1908, on the Royal Mail Steamship “Trent,” and after touching at Jamaica, Colon, Savanilla and La Guayra, we disembarked at Port of Spain, Trinidad, on March 9th. Leaving this port in a Venezuelan sloop we cruised among the caños north of the Orinoco Delta, and explored the country about the Venezuelan Pitch Lake—La Brea. To Mr. Eugene André of Trinidad, we are deeply indebted for a hundred kindnesses which did much to make our trip a success. We wish also to express gratitude to Mr. Mole, Mr. Anduse and especially to the late Mr. Ellis Grell. PART II. On the 15th of February, 1909, we sailed from New York on the Steamship “Coppename” of the Royal Dutch West Indian Mail, and with only a single stop—Barbadoes—reached Georgetown, British Guiana, on the 24th of the same month. In British Guiana we made three expeditions; two as the guests of Mr. and Mrs. Gaylord Wilshire, having as our objective points two gold mines in the midst of the wilderness, the first at Hoorie in the northwest, the second on the Little Aremu in central Guiana. On these expeditions we were spared all the usual annoyances of transportation; food and servants and everything at the mines were put at our service to facilitate our study of the nature life of the country. The third trip to the savanna region further south was made at the invitation of Mr. and Mrs. Lindley Vinton, two Americans living in Georgetown, who placed their home at our disposal while we remained in Georgetown. During our entire stay in British Guiana we received unfailing courtesy and kindness,—from the Governor, Sir Frederick Hodgson, down to the great black hospitable wilderness police. Professor J. B. Harrison allowed us to use the old aviaries at the Botanical Gardens, and with Mr. James Rodway of the Georgetown Museum and Mr. B. Howell Jones, extended to us all the courtesies in his power. For figures 97, 98, 108, 144, and 158 we are indebted to Dr. Hiram Bingham, and figures 83, 109, 130, and 131 are from photographs belonging to the New York Zoölogical Society and were taken by Mr. E. R. Sanborn. All the others were taken by ourselves with a Graflex Camera and 27-inch Goerz lens, and a pocket Kodak, both 4 by 5 in size. The first two chapters appeared in their original form in “Harper’s Monthly Magazine,” and the third chapter in “Recreation.” Our thanks are due to Dr. William T. Hornaday, Director of the New York Zoölogical Park, for the leave of absence which made possible these expeditions.