new Sjjecies of Aolm. 203 



grevislj buff. Basal lialf of tail similar in colour to back, 

 distal portion brownish black and rather busliy. 



ISkuU with lar^e heavy teeth. 



l)imen8ions of the type (measured in skin) : — 



Head and body 365 mm.; tail 350 ; hind foot 82. 



»^kiill (occipital region brukoii) : basilar length -lO'S; 

 zygomatic breadth oH-ii ; greati-st breailih across oibital 

 legion -ll'G; condylo-basiiar length K) ; j)alatilar length 17"5; 

 kngth ot upper tooth-row, from front of first premolar to 

 back of last molar, 1(3. 



J/ab. Mountains of Tolima, Colombia. Altitude 6000 feet. 



Ti/^e. Adult female. B..M. no. 'JO. 2. 22. 4. C dlccted 

 and presented by Mr. K. B. White. In addition to the type, 

 the Museum recciveil three other spL-cimcns of this species from 

 Mr. White, all from the Tolima Mountains. 



These long-haired Douroucoulis undoubtedly represent a 

 mountain form, which, though resembling A. trivirgatus in 

 soMie respects, is easily dUL-rentiated by its long liair and 

 broad indis'inct head-stripes. 



Aotus microdofiy sp. n. 



A sniall-toothed form, allied to the foregoing species. 

 Hair of back soft and rather long, measuring about 38 mm. 

 in length. General colour of back brownish orange (between 

 tan-colour i;o. 2 and bistre iio. 3, ' Repertoire ^e Couleurs'), 

 paling to a brownish yellow (snuff-colour no. 2, 'llepertoire 

 cie Couleurs ') on the flanks and upper surfaces of limbs. 

 Individual hairs of back slaty brown at base, paling to a 

 greyish ring in the miildle, the colour then changing to buff 

 and orange (tan-colour no. 2, 'llepertoire de Couleurs '), the 

 hairs terminating in a black tip. Backs of hands and feet 

 reddish brown. Head-stripes brownish, rather indistinct and 

 continued back on to the hinder part of the head, though 

 not meeting one another posteriorly. Light marks above 

 eyes yellowish white, becoming richer in colour on the crown, 

 where they gradually pass into the brownish-orange colour 

 of the neck. Under surface of body, throat, and limbs butly 

 (yellowish buff no. 3, 'Repertoire de Couleurs'). Tail at 

 base reddisii (tan-colour no. 2, * Repertoire de Couleurs '), 

 distal portion black. 



{Skull resembles that of A. lanius, only the teeth are 

 smaller. 



Dimensions of the type (measured in skin) : — 



Head and body 394 mm. ; tail broken ; hind toot 80. 



Skull : greatest length 61'5 ; basilar length 39; zygomatic 



