24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



Measurements. — Type: head and body, 236 mm.; tail, 220; hind 

 foot (dry), 52 (48) ; condylobasal length of skull (teeth slightly 

 worn) 49.9; zygomatic breadth, 34.8; interorbital breadth, 22.3; 

 nasal, 16.2; diastema, 12.5; mandible, 34.8; maxillary toothrow 

 (alveoli), 10.6; mandibular toothrow (alveoli) 10.9. 



Specimens examined. — Twelve, from the following localities in 

 Dutch Southeast Borneo: Birang River, 5; Segah River, 6; Tali- 

 saian Mountain, 1. 



SCIURUS HUMILIS, new species 



Type. — Immature female (m 3 in place, permanent premolars just 

 appearing), No. 123116, United States National Museum. Collected 

 on the Kateman River, East Sumatra, August 20, 1903, by Dr. W. 

 L. Abbott. Original No. 2751. 



Diagnosis. — A member of the Sciurus lozvi group agreeing in size 

 with S. robinsoni of the Malay Peninsula and 6\ seimundi of Pulo 

 Kundur, Rhio Archipelago, but differing from the former in darker 

 general color (essentially like that of the Bornean S. lowi but more 

 dull; feet less grizzled; muzzle and eyering scarcely different from 

 face) and from the latter in the normal extent of the light-buff of 

 underparts and inner surface of legs. 



Measurements. — Head and body, 114 mm.; tail imperfect; hind 

 foot (dry), 33.5 (31.5); condylobasal length of skull, 28.1; zygo- 

 matic breadth, 18.3; interorbital breadth, 10.2; nasal, 7.8; diastema, 

 7.0; mandible, 19.6; maxillary toothrow (alveoli), 5.8; mandibular 

 toothrow (alveoli), 6.0. 



Specimen examined. — The type. 



LARISCUS BERDMOREI AMOTUS, new subspecies 



Type. — Adult male (skin and skull), No. 124152, United States 

 National Museum. Collected on Domel Island, Mergui Archipelago, 

 January 30, 1904, by Dr. W. L. Abbott. Original No. 3081. 



Diagnosis. — Like Lariscus berdmorei berdmorei from southern 

 Tenasserim, but skull with more slender rostrum. 



Measurements. — Type: head and body, 200 mm.; tail, 130; hind 

 foot (dry), 41 (40) ; condylobasal length of skull (teeth much worn), 

 48.1 ; zygomatic breadth, 27.6; interorbital breadth, 27.5 ; nasal, 16.0; 

 diastema, 13.2; mandible, 32.3; maxillary toothrow (alveoli), 10.5; 

 mandibular toothrow (alveoli), 10.0. 



Specimens examined. — Two, both from Domel Island. 



Remarks. — Though externally similar to Lariscus berdmorei herd- 



