24 ARKIV FÖR ZOOLOGI. BAND 8. N:0 16. 



c? ad. o 71 ad. 



Basal length 85,5 mm 85 mm 



Zygomatic breadth . , 40,5 » 44 » 



Least interorbital breadth 18,7 » 20 » 



Palate length from gnathion 61,8 » 59, i » 



Combined length of threeuppermolars 14,6(1 4,4) » 13,4(12,5) » 

 Breadth of brain-case 37,5 » 40 » 



Length of head and body (skin) about 45 cm, length of 

 tail about 22 cm; length of hind foot (dry) s. u. about 58 mm, 

 c. u. about 63 cm. 



From the above description is apparent that this new sub- 

 species differs from Nasua olivacea by its uniform black tail 

 (without black rings), and from N. o. meridensis also by the 

 absence of »a black line down the back. When visiting British 

 Museum in April 1913 I had the opportunity of seeing typical 

 specimens as well of N . olivacea as of N. o. meridensis; and both 

 proved to differ from this subspecies very plainry, especially 

 the latter. In both those specimens the under-fur is dark, black- 

 ish grey, and this forms a very good characteristic for their 

 distinction from this new Nasua olivacea quitensis. 



The skull of this one is also much smaller than in the others 

 in every respect, the greatest length of the skull of the type of 

 N. o. meridensis being, according to Thomas, 133 mm with 

 a zygomatic width of 50 mm, and a palate length of 69 mm. 



The molars are small, but they vary in size a great deal, 

 as the measurements above pro ve. In one of the specimens 

 their length is on one side similar to that of N. o. meridensis 

 (12,5), but even when they reach their greatest size (14,6), 

 they are much smaller than for instance in Nasua quichua 

 (17,5), which Thomas has described 1 from the province of 

 Azuay, Ecuador. The latter has also a much larger skull (great- 

 est length 114 mm) and is quite different in colour, »grey ante- 

 riorly and bright rusty posteriorly ». t 



All the species mentioned have also greater dimensions 

 of body, tail and hind feet. Nasua phwocephala Allén from 

 Venezuela 2 appears to be still larger in every respect. Nasua 

 montana Tschudi from Peru has a much larger skull than the 

 now described race, and also ringed tail. The Nasua from 



1 1. c. p. 248. 



2 Bull. Amer. Mus. Nat. Hist, Vol. XX, 1904 p. 334. 



