关键词: 白头叶猴, 种群密度, 年龄结构

Abstract: The population of White—headed Iangur (Presbytis Leucocephalus) in Longlin village of Fushue County，Guangxi Province was investigated from July tO Octobe,1991．The habitat and distribution of White—headed langur see fig．1． Data showed that 166 individuals of 28 groups and 3 single males existed in Longlin habitat． Maximum number in one group was 16，minimum number was 2，population density was 8 individuals per square km and average size was 5．3 individuals per group．23 monkey groups (Table 2) were divided from age structure inlo three paris．Composition of population contained 88 adults， 25 youngs and 20 cubs，percentage were 67．6% ， 20．2% ，12．2% respectlvely．

Key words: White—headed Langur(Presbytis Leucocephalus)：Population density Age composition