But to return to the Zoological wonders of the Upper Amazon, birds, insects, and butterflies are all spoken of by Mr. Bates in his chapter on the natural features of the district, and it is evident that none of these classes of beings escaped the observation of his watchful intelligence. The account of the foraging ants of the genus _Eciton_ is certainly marvellous, and would, even of itself, be sufficient to stamp the recorder of their habits as a man of no ordinary mark. The last chapter of Mr. Bates’ work contains the account of his excursions beyond Ega. Fonteboa, Tunantins—a small semi-Indian settlement, 240 miles up the stream—and San Paulo de Olivenca, some miles higher up, were the principal places visited, and new acquisitions were gathered at each of these localities. In the fourth month of Mr. Bates’ residence at the last-named place, a severe attack of ague led to the abandonment of the plans he had formed of proceeding to the Peruvian towns of Pebas and Moyobamba, and “so completing the examination of the Natural History of the Amazonian plains up to the foot of the Andes.” This attack, which seemed to be the culmination of a gradual deterioration of health, caused by eleven years’ hard work under the tropics, induced him to return to Ega, and finally to Pará, where he embarked, on the 2nd June 1859, for England. Naturally enough, Mr. Bates tells us he was at first a little dismayed at leaving the equator, “where the well-balanced forces of Nature maintain a land-surface and a climate typical of mind, and order and beauty,” to sail towards the “crepuscular skies” of the cold north. But he consoles us by adding the remark that “three years’ renewed experience of England” have convinced him “how incomParábly superior is civilised life to the spiritual sterility of half-savage existence, even if it were passed in the Garden of Eden.” * * * The following is the list of H. W. Bates’ published works: Contributions to an insect Fauna of the Amazon Valley, Paper read before the Linnean Society, June 21, 1861; The Naturalist on the Amazons, a Record of Adventure, Habits of Animals, Sketches of Brazilian and Indian Life . . . during Eleven Years of Travel, 1863; 3rd Edition, 1873, with a Memoir of the author by E. Clodd to reprint of unabridged edition, 1892.