. A year of Costa Rican natural history. 5, 261 INDEX S77 Weldon, Mr. and Mrs. J., 35, 484, 485Werckle on dropping of leaves by trees, 346Westfalia, 298, 312 Wet season, 10, 326, 347, 415, 444, 470Wheat in C. R., Little, 38Wheeler, Prof. W. M., on Acacia-dwelling ants, 366-367, 452on ants on Cecropia trees, 177on fungus-growing ants, 241White ants. (See Termites.)Williamson, E. B., on dragonflies, 256Williston on larvae of Eristalis, 182Wind, Furious, 436, 438, 439Windmills, 446, 471Winds, Prevailing, 9Witches, 389 Wood ants. (See Termites.)Woodbridge, Mr. and Mrs. R. E., 283, 284, 285Woodpeck


. A year of Costa Rican natural history. 5, 261 INDEX S77 Weldon, Mr. and Mrs. J., 35, 484, 485Werckle on dropping of leaves by trees, 346Westfalia, 298, 312 Wet season, 10, 326, 347, 415, 444, 470Wheat in C. R., Little, 38Wheeler, Prof. W. M., on Acacia-dwelling ants, 366-367, 452on ants on Cecropia trees, 177on fungus-growing ants, 241White ants. (See Termites.)Williamson, E. B., on dragonflies, 256Williston on larvae of Eristalis, 182Wind, Furious, 436, 438, 439Windmills, 446, 471Winds, Prevailing, 9Witches, 389 Wood ants. (See Termites.)Woodbridge, Mr. and Mrs. R. E., 283, 284, 285Woodpeckers, 176, 216, 375 Wren, 176 Yellow fever. Absence of at Limon, 5 Yuca (plant), 7, 36, 107, 206, 210, 249 (rock), 412Yucca, 332 Zambos, 416, 473 Zamoras photographic album, 24 Zapandi, Rio, 412 Zapote, Rio, 160 (tree), 428Zeledon, J. C, 27Zent, II, 14Zent Junction, 12, 15Zonchiche, 71, 322Zopilotes, 3, s, 71, 72, 215, 322Zopilotillo, 147Zorillo, 398 real, 87 (88)Zorro, 319Zurqui, Cerros de, 29, 93 Printed in the United States of America. CENTRAL COSTA RICA V HE following pages contain advertisements of a few ofthe Macmillan books on kindred subjects Earth Features and their Meaning A Textbook for Cultural Courses on General Geology By WILLIAM HERBERT HOBBS Professor of Geology, University of Michigan Profusely illustrated, 8vo, $ The purpose of Earth Features and their Meaning, by ProfessorW. H. Hobbs, is primarily to furnish a readable work on miscellaneoustopics of modern geology and physical geography. In his preface theauthor lays stress on the fact that the book is a series of readings to stimu-late the traveler to appreciate the landscape wherever he may go. Aspecial emphasis is laid upon earthquakes, volcanoes, the work of water,desert processes, and glaciers. . The book is noteworthy for the importance given to the experimentalmethod in geology, for good reading references at the end of each chapter,for an unusually good analysis of weathering and the surface proces


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