Abstract: A great number of fossils of Ramapithecus and Sivapithecus were collected at the Shihuiba locality in Lufeng County, Yunnan Province from 1975-1983. The material consists of the following specimens.
Ramapithecus: three crania, five mandibles. 23 pieces of fragments of erania and jaw bones, 22 dental rows and 329 isolated teeth, as well as two phalanges;
Sivapithecus: two crania, five mandibles, 24 pieces of fragments of erania and jaw bones, seven dental rows and 321 isolated teeth, as well as one scapula and one clavicle.
This paper is a detailed study of the material.

Key words: Lufeng; Ramapithecus; Sicapithecus; Sexual dimorphism