58 Mr. 0. Thomas on neiv Nasna, Lutra, and 



and broader — covering the whole breadth of the neck — 

 anteriorly, narrowing and becoming a defined blackish 

 line posteriorly. Under surface as in N. candace, the throat 

 and chest dull buffy whitish, the belly mixed brown and 

 buify. Head grey, the hairs grizzled black and white, the 

 grizzling becoming coarser posteriorly and passing into the 

 grey-ringed, broadly black-tipped hairs o£ the nape. Eyes 

 with marked black patches. Ears black, their upper edge 

 whitish. Forearms and metacarpus pale buffy, as in 

 N. candace, digits brown. Hind feet brown mixed with 

 pale buffy. Tail with about eight black and whitish rings. 



Skull, allowing for differences due to age, apparently 

 quite like that of the type of iV. candace. 



Hind foot of type 81 mm. 



Skull : greatest length 124 ; zygomatic breadth 53 ; 

 interorbital breadth 25 ; breadth of brain-case 45 ; palatal 

 length 74 ; palatal foramina 5 ; combined length of p* and 

 two molars 19"3j breadth of ^/ 5"8. 



Hab. Bogota. 



T[/pe. Subadult male. B.M. no. 44. 1. 18. 13. Purchased 

 of Parzudaki. 



This Nasua is clearly most nearly allied to the Medellin 

 iV. candace, agreeing with that species and differing from 

 iV. dursalis by its buffy forearms. It differs, howevei', by 

 its grey head and blacker mesial dorsal area. 



[Nasua guichuajivaru, subsp. n. 



Like true cjuichua, but larger. 



Coloration essentially as in quichua, the grey patches on 

 the anterior flanks behind the shoulders similarly developed, 

 and rendered more prominent by the rufous colour of the 

 back extending on to the nape between them. Colours of 

 head rather darker and richer, the crown strong fulvous 

 instead of buffy, divided mesially by black ; muzzle darker ; 

 light patches above and below eyes smaller and less con- 

 spicuous. Back and tail rich ferruginous, the latter obscurely 

 ringed with black. Belly darker, the longer hairs mostly 

 tipped with fulvous or buffy instead of whitish. 



Skull decidedly larger throughout than in quichua, the 

 muzzle heavier, the forehead higher and more convex, the 

 brain-case larger, rounder, more inflated. 



Top of skull more heavily crested in the oldest example 

 than in the type of quichua, though the latter has more worn 

 teeth. Postorbital processes, on the other hand, less deve- 

 loped. 



