Maxomys rajah (Thomas, 1894) . Ann. Mag. Nat. Hist., ser. 6, 14:451.

TYPE LOCALITY: Malaysia, Sarawak (N Borneo), Gunung Batu Song .

DISTRIBUTION: Endemic to the Sunda Shelf; Peninsular Thailand south of Isthmus of Kra, Malay Peninsula, Riau Archipelago, Sumatra, amd Borneo; absent from Java and Bali.

SYNONYMS: hidongis, lingensis, pellax, similis .

COMMENTS: Distribution similar in broad outline to that of M. whiteheadi . Occurs sympatrically with M. surifer, and although samples of each are often misidentified, the two differ in a suite of morphological, ecological, behavioral, and biochemical features (Chan et al., 1979; see references in Musser et al., 1979).