204 On a new Species o/'Piesbytis. 



breadtli 30o ; greatest breadth across orbital region 41 ; 

 condylo-basilar length 44 ; palatilar length 16 ; length of 

 upper tooth-row, from front of iirst premolar to back o£ 

 last molar, 14. 



Hah. Macas, Ecuador. 

 Type. Adult. B.M. no. 72. 4. 30. 4. 



The small teeth, brown hands and feet, and the arrange- 

 ment of the head-stripes indicate that this southern form, 

 though closely related to A. lanius^ must be looked upon as 

 a distinct species. 



XXV. — A new Species of Presbytia:, allied to P. rubicund us. 

 By Guy DoLLMAN, B.A. 



(Published by permission of the Trustees of the British Museum.) 



Preshylis ignitus, sp. n. 



Size and general proportions similar to Preshytis ruhi^ 

 cundus, Aliil!.^ but much lighter in colour, and having the 

 f)ontal region of the skull dome-shaped. 



Ui)per surface of body and limbs a uniform reddish colour 

 (" dull brick-red no. 4,'^ Repertoire de Couleurs), the long 

 hair on tlie neck sligiitly paler. Backs of hands and feet 

 very similar in colour to body, not black as in P. rubi- 

 cundus. Underside of body and limbs rather lighter than 

 upper surface (" dull brick-red no. 2/' Repertoire de 

 Couleurs). Tail, throughout its entire length, similar in 

 colour to back. 



Skull with a high dome-shaped forehead, presenting a 

 marked contrast to the flat skull of P. ruhicundus, where the 

 forehead hardly rises above the level of the supraorbital 

 ridges. Cranium rather shorter; nasals broader and much 

 flatter. 



Dimensions of the type (measured in skin) : — 

 Head and body 600 ram.; tail 750; hind foot 160. 

 Skull : greatest length 94 ; zygomatic breadth 72 ; 

 greatest breadth across oibital region 62; basilar length 59; 

 condylo-basilar length 67 ; palatilar length 27 ; width of 

 palate, behind second premolar, 20; length of upper tooth- 

 row from front of first premolar to back of last molar 23*5. 



iJah. i\lount Mulu, Baram, Sarawak, North Borneo. 

 Altitude 1000 feet. 



Type. Adult female. B.M. no. 04. 6. 2. 31. Collected 



