33" Bulletin American Museum of Natural History. [Vol. XX, 



Maripa, 2 specimens, adult female and young, Dec. 28, and 

 Jan. 30. 



No. 16135, ? ad., the whole front and sides of the head are cov- 

 ered with erect, stiff, bristly hairs, very different from the coarse, 

 long, soft hairs of the rest of the pelage. These hairs are shorter on 

 the face in front of and around the eyes, longer and stiff er over the 

 top of the head, and still longer and less rigid on the sides of the head, 

 neck, and throat. The coloration of the 'mask' is peculiar, being 

 yellowish white on the front border, passing into golden ochraceous 

 over the top and sides of the head and on the throat, enclosing a large 

 circular area of ferruginous chestnut on the side of the head behind 

 the eyes. There is also a narrow blackish eyering and a short, well- 

 defined blackish postocular stripe. Top of head and nape, back to 

 shoulders, blackish brown; rest of upper parts mixed blackish brown 

 and dull soiled grayish white, which coloration extends onto the outer 

 surface of the limbs; rump yellowish gray, unmixed with blackish; 

 ventral surface and inside of limbs lighter than sides dingy gray 

 with less admixture of dusky hairs. A median black line is continued 

 back over the shoulders from the nape, with a yellowish white stripe 

 on each side. The hairs of the front part of this black dorsal band 

 are rnuch finer and softer than those of the general pelage, and the 

 woolly underfur of the adjoining whitish bands is suffused basally 

 with a golden tint. Claws white at tip, the basal two thirds yellowish. 



No. 16136, $ ad., Feb. 6, is similar but the colors in general are 

 everywhere paler, with the light colors prevailing over the dark tints. 

 There is, however, a general difference in the character of the dorsal 

 patch, which is sharply defined by the different character of the hair 

 as well as by its strikingly contrasting colors. This patch has a length 

 of 70 mm. by a width of about 35 (as measured from the dry unfilled 

 skin), and is long oval in outline. The hair, evidently new, is short 

 and stiff, like that on the mask, being only about 10 mm. in length, 

 in striking contrast with the adjoining loose flaccid hairs 30-50 mm. 

 long. The patch is divided by a median band of deep black, varying 

 in width from 7 to 20 mm., being widest anteriorly and narrowest 

 in the middle, and flanked on either side by a much wider band of 

 ochraceous orange. 



No. 16134, $ juv. (about one third grown), Jan. 25. This closely 

 resembles in coloration and texture of pelage No. 16135, but the tints 

 are paler, and the hair rather softer. 



The 6 adults of this series, all sexed by the collector as 

 females, vary greatly in the color of the dorsal surface, some 

 being much lighter than others, with the dark color arranged 

 in irregular patches. Three of them have the bright-colored, 



