192 Dr. D. G. Elliot on apparently ncio 



black predominating on the forehead ; the rump is red<ler 

 than the back and is a burnt-sienna on the outer side ot the 

 limbs ; hands and feet claret-brown ; sides of head, throat, 

 inner side of limbs, and underparts maroon ; basal third of 

 tail black, the hairs being chestnut with broad black tips, 

 rest of tail mixed black and yellowish grey or veiy pale clay- 

 colour, the underside of tail being almost altogether clay- 

 colour; ears black. 



Mea^urevients. Size about the same as C. cupreus. Skull : 

 occipital region has been cut away; intertemporal width 

 32 mm.; zygomatic width 41; palatal length 21; width 

 between last molars 12; breadth of brain-case 35; length of 

 nasals 9 ; length of upper molar series 14; length of lu^ 5; 

 length of mandible 42 ; extreme height of mandible 35 ; 

 length of lower molar series ]7*5. 



B.M. no. of type 51. 7. 3. 1. 



This species is nearest C. c«<;>rews, but is altogether different 

 in colour and darker in all its hues. The skulls also are not 

 at all in accord, the differences mentioned being very con- 

 spicuous when they are compared. The unique example has 

 no history beyond the statement that it came from Brazil. 



Callicehus suhrufm, sp. n. 



Type locality, Pachitea, Ucayali River, Peru. Altitude 

 400 to 500 feet. 



Gen. char. Allied to C. leucouietopaj but colour entirely 

 different. 



Colour. Face black; a narrow black bar on forehead 

 above eyes, succeeded by a broader one of white ; rest of 

 head on top, neck, and entire upperparts bright russet, 

 becoming darker and more reddish on the rump, the hairs 

 being slate at base, then alternately ringed with slate and 

 bright russet, or on the rump with slate and dark russet or 

 reddish; arms to elbows and thighs to knees grey, the hairs 

 being seal-brown at base, then russet, and tips grey, this 

 colour overlying the rest ; hands and feet and rest of limbs 

 bright chestnut-red ; sides of face, whiskers, inner side of 

 limbs, throat, chest, and middle of abdomen bright chestnut- 

 red ; fingers and toes yellowish grey ; tail, basal third black, 

 with chestnut hairs mixed with black at the root, remainder 

 light grey above, whitish beneath ; hair on ears white. 



Aleusarements. Size about equal to that of C. leucometopa. 

 Skull: occipito-nasal length 51 mm. ; hensel 40; zygomatic 

 width 35; intertemporal width 29; palatal length 18; 

 breadth of braiu-case 33 ; nasals broken ; length of upper 



