Two new species of the genus Luperosaurus (Luperosaurus yasumai and Lu
perosaurus serraticaudus) are described from Kalimantan and Sarawak, B
orneo. Luperosaurus yasumai most closely resembles Luperosaurus joloen
sis and Luperosaurus palawanensis but is distinct from any other conge
neric species in having fewer scansors on toe IV (seven) and a. strong
ly depressed tail. Luperosaurus serraticaudus differs from all other c
ongeners except Luperosaurus brooksi and Luperosaurus browni in having
an elongated head and body, roundish and flat or only slightly convex
dorsal tubercles, and flat, imbricate or subimbricate ventrals. Luper
osaurus serraticaudus differs from L. brooksi and L. browni in having
greater numbers of scales bordering the nostril (six), supralabials (1
5) and infralabials (13-14).