104 Proceedings of the Biological Society of Washington. 



Diagnosis. — In general like Tarsius fuscus but very much smaller; upper- 

 parts much richer colored, less buffy, more reddish brown; the pelage 

 longer. Spot behind ear buffy rather than white. Tail and feet haired as 

 in fuscus. Skull very much smaller than that of fusciis, appearing scarcely 

 more than half its bulk (actual relationship about as 12 to 19); mandible 

 particularly small and weak; lower incisors relatively much higher; second 

 unicuspid smaller than first. 



Measurements. — Type: Head and body, 95; tail, 205; hind foot, 55. 

 Skull: Greatest length, 31.0; condylobasal length, 25.1; greatest breadth, 

 26.3; mandible, 18.7; maxillary toothrow, entire, 12.7; upper molar — 

 premolar series, 10.7; mandibular toothrow, entire, 11.8. 



Specimens examined. — Three, the type and two from Gimpoe, Middle 

 Celebes. 



