List of Contributors. Preface. Part I: Evolutionary Biology and Biogeography. 1. The Guenons: An Overview of Taxonomy and Diversity; T.M. Butynski. 2. Y-chromosomal Window onto the History of Terrestrial Adaptation in the Cercopithecini; A.J. Tosi, et al. 3. Molecular Timescale and Gene Tree Incongruence in the Guenons; T. Disotell, R. Raaum. 4. Phylogeny of the Cercopithecus lhoesti Group Revisited: Combining Multiple Character sets; J.-P. Gautier, et al. 5. Terrestriality and the Maintenance of the Disjunct Geographical Distribution in the lhoesti group; B. Kaplin. 6. A Biogeographical Analysis of Central African Guenons; M. Colyn, P. Deleporte. 7. Hybridization Between Red-tailed Monkeys (Cercopithecus ascanius) and Blue Monkeys (C. mitis) in East African forests; K. Detwiler. 8. Genetic Study of Translocated Guenons: Cercopithecus mona on Grenada; K.A. Horsburgh, et al. Part II: Behavior. 9. Diversity of Guenon Positional Behavior; W.S. McGraw. 10. Unique Behavior of Mona Monkeys, Cercopithecus mona: All-male Groups and Copulation Calls; M.E. Glenn, et al. 11. Group Fission in Red-tailed Guenons (Cercopithecus ascanius) in the Kibale National Park, Uganda; T. Windfelder, J.S. Lwanga. 12. Interindividual Proximity and Surveillance of Associates in Comparative Perspective; A. Treves, P. Baguma. 13. Why Vervets (Cercopithecus aethiops) Live in Multi-male Groups; L.A. Isbell, et al. 14. When are There Influxes in Blue Monkey Groups? M. Cords. 15. Costs and Benefits of Alternative Mating Strategies in Samango Monkey Males; M.C. Macleod, et al. 16. Female Reproductive Endocrinology in Wild Blue Monkeys: a Preliminary Assessment and Discussion of Potential Adaptive Functions; K. Pazol, et al. 17. Grooming and Social Cohesion in Patas Monkeys and Other Female-bonded Guenons; J. Chism, W. Rogers. 18. Development of Mother-infant Relationships and Infant Behavior in Wild Blue Monkeys (Cercopithecus mitis); S. Foerster, M. Cords. 19. Influence of Foraging Adaptations on Play Activity in Red-tailed and Blue Monkeys with Comparisons to Colobus Monkey; E.A. Worch. 20. Effects of Natural and Sexual Selection on the Evolution of Guenon Loud Calls; K. Zuberbuhler. Part III: Ecology. 21. Resource Switching in Guenons: a Community Analysis of Dietary Flexiblity; J. Lambert. 22. Variation in the Diet of Cercopithecus species: Differences Within Forests, Among Forests and Across Species; C.A. Chapman, et al. 23. Diet of the Roloway Monkey, Cercopithecus diana roloway, in Bia National Park, Ghana; S. Hunt Curtin. Part IV: Conservation. 24. Conservation of Fragmented Populations of Cercopithecus mitis in South Africa: the Role of Reintroduction, Corridors and Metapopulation Ecology; M.J. Lawes. 25. Assessing Extinction Risk in Cercopithecus monkeys; T. Ukizintambara, C. Thebaud. 26. Conservation of the Guenons: An Overview of Status, Threats, and Recommendations; T.M. Butynski. Editors' Conclusion. Literature Cited. Index.