454 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



Measurements. — External iiicasurcinents of type: Total length, 400; 

 head and body, 215; tail vertebraB, 185; hind foot, 51 (47). Average 

 of ti\M^ adnlts from tlie type locality: Total length, 81)5 (375-411); 

 head and body, 20S (185-221); tail vertebrae, 187 (180-190); hind foot, 

 51.4 (51-52); hind foot without claws, 48 (47-49). For details see 

 tabU>, page 456, 



Cranial measurements of type: Greatest length, 52 (51) ;« basal 

 length, 43.() (43); basilar length, 40 (40.2); length of nasals, 16.4 (16); 

 breadth of ])oth nasals together anteriorly, 7.4 (8.2); diastema, 11.6 

 (11.8); least interorbital breadth, IS (17.8); zygomatic breadth, 30 

 (30.4); mandible, 32.4 (31.4); maxillary tooth row (alveoli), 9.6 (9.6); 

 mandibular tooth row (alveoli), 10 (9). 



Specimens examined. — Five, all from Pulo Mansalar. 



Memm'l's. — This is a well-marked form of the Sciuriis notatus group, 

 closely related to S. mttatus, but readil}^ distinguishable by its dark 

 general coloration, dull outer lateral stripe, and black-tipped tail. 

 The series shows no variations worth}- of special note. 



SCIURUS PRETIOSUS, new species. 



Type.— Mu\t female (skin and skull). Cat. No. 114325, U.S.N.M. 

 Collected on Pulo Bangkaru, Banjak Islands, January 20, 1902. Orig- 

 inal number, 1442. 



Charaeters. — Like Sciunis saiurafus, but average size less, red of 

 underparts not as bright, tail not darker than back, and pencil not 

 darker than rest of tail. Skull distinctly smaller than that of Sciurus 

 saturatus. 



Colm'. — In general the color so closely resembles that of Sciurus 

 saturahis as to need no detailed description. On comparison of the two 

 series the red of the underparts is seen to be less bright than in the 

 Mansalar squirrel, and the pale element in the grizzle of the upperparts 

 lessj'Cllow, though so far as possibility of description is concerned the 

 colors are essentially the same. The most tangi])le ditference is in the 

 amount of black in the tail. In the Pulo Bangkaru animal this shows 

 no tendency to form a black pencil or dark lateral fringe, as in Sciurus 

 saturatus. 



Skull and teeth. — Both skull and teeth are smaller than in Sciurus 

 saturatus or S. vittatm, but I can detcc^ft'-no differences in form. 



Measurements. — External measuremoftts of type: Total length, 375; 

 head and body, 200; tail vertebra?, 175; hind foot, 46 (43). Average 

 of seven adults from the type locality: Total length, 387 (372-400); 

 head and Wy, 207(192-220); tail vertebrjs, 181 (170-195); hind foot, 

 47.6 (46-49); hind foot without claws, 44.3 (43-46). For details see 

 table, page 456. 



aMeasurements in parentheses are those of an adult female ScrnrKs viUatm from 

 Tapanuli Bay, Sumatra (No. 114518). 



