Vol. 38, No. 4 October 1997

Ihobe,Hiroshi: Non-antagonistic Relations Between Wild Bonobos and Two Species of Guenons..........351 Key Words: Interspecific relation, Bonobo, Wolf's guenon, Red-tailed monkey.

Hayama,Shin-Ichi; Kamiya,Shinji; Nigi,Hideo: Morphological Changes of Female Reproductive organs of Japanese Monkeys With Reproductive Conditions..........359 Key Words: Japanese monkey, Ovary, Uterus, Nipple, Measurements.

Jack,Katharine M.; Pavelka,M.S.M.: The Behavior of Peripheral Males During the Mating Season in Macaca fuscata ..........369 Key Words: Peripheral males, Access to mates, Japanese macaque, Proximity, Provisioning.

Nishida,Toshisada: Sexual Behavior of Adult Male Chimpanzees of the Mahale Mountains National park, Tanzania..........379 Key Words: Sexual behavior, Chimpanzee, Genital inspection, Mating, Female choice.

Shimada,K.Makoto; Shotake,Takayoshi: Genetic Variation of Blood Proteins Within and Between Local Populations of Grivet Monkey( Cercopithecus aethiops aethiops ) in Central Ethiopia..........399 Key Words: Grivet monkey, Blood protein variation, Local population, Variability, Population differentiation, Population size fluctuatio.

Short Communications

Hosey,Geoffrey R.; Jacques,Marie; Pitts,Angela: Drinking from Tails: Social Learning of a Novel Behaviour in a Group of Ring-tailed Lemurs( Lemur catta )..........415 Key Words: Ring-tailed lemur, Novel behaviour, Stimulus enhancement, Imitation.

Gebo,Daniel L.; MacLatchy,Laura; Kityo,Robert: A New Lrisid Humerus from the Early Miocene of Uganda..........423 Key Words: Miocene, Locomotion.

Researach Report

Marinho-Filho,Jader; Verissimo,Ed Wilson: The Rediscovery of Callicebus personatus barbarabrownae in Northeastern Brazil with a New Western Limit for Its Distribution..........429 Key Words: Titi monkey, Caatinga, Gallery forests, Brazil.

Book Reviews..........435

Note..........439

Cumulative Contents, Author Index, Scientific Name Index, and Subject Index for Volume 36-38 (1995-1997)..........441