BANGS : CHIRIQUI MAMMALIA. 23 



Color and Pelage. — Pelage, short and rather hispid, with scarcely any under- 

 fur. Upper parts, finely mixed (owing to the annulutions of the hairs) blackish 

 brown (perhaps nearest mummy brown) and tawny, the tawny color predom- 

 inating on sides, the dark brown color along middle of back; orbital ring, 

 back of ear and a small spot just behind ear clear tawny; under parts tawny, 

 becoming yellower, about raw sienna on under side of neck and head, and often 

 the breast similarly colored ; tail much the same as back, but with the tavyny 

 annulations wider ; deeply fringed along sides with clear tawny, under side 

 darker than upper. 



Variations in Color. — The large series before me presents very little color 

 variation, and apparently no seasonal variation in color; a few specimens only 

 in very worn pelage are duller, more rusty brown above, due to actual fading; 

 the amount of the yellowish color (raw sienna to ochraceous) that always 

 occupies the under side of head and neck varies in different individuals — in 

 two extreme specimens, Nos. 10,416, and 10,038, 9 and J adults, it covers 

 the whole under parts, there being no tawny. There are also three albinistic 

 specimens, irregularly marked with white on under parts and feet. 



Skins from the Volcan de Chiriqui from upwards of 4,000 feet altitude are 

 more woolly with decidedly more under fur than lowland examples, but other- 

 wise they do not differ. 



Measurements (ten adults type and topotypes) — 



Sex. 



s 



$ 

 $ 

 $ 



9 

 9 



Skull, type, adult ^, basal length, 46.2; occipitonasal length, 54; zygo- 

 matic width, 31.4; length of nasals, 16.4 ; length of palate, to palatal notch, 

 23.2 ; to end of pterygoid, 30. 



Remarks. — This new form which is found apparently throughout Chiriqui, 

 in suitable places, is a slightly differentiated southern race of S. hoffmanni of 

 Costa Rica. It is distinguished by paler under parts, which are much yellower, 

 less brick-red, and by the diflFerent shade of the upper parts. I do not believe 

 that S. hoffmanni is a subspecies of S.'cBstuans of South America, but as this 

 has been the vie\v*taken by recent reviewers of the group, for the sake of uni- 

 formity I so treat it here. 



