6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 63 



to F. pardinoides oncilla Thomas, from Volcan de Irazti, Costa Rica, 

 but the type of the latter without skull is described as a much smaller 

 animal with clay colored under parts. No comparison with the 

 forms of Felis pajeros seems necessary. 

 Specimens examined. — One, the type. 



AOTUS ZONALIS, new species 



Type from Gatun (altitude loo feet), Canal Zone, Panama, No. 

 1 7 123 1, skin and skull, female adult, U. S. National Museum (Bio- 

 logical Survey Collection) ; collected by E. A. Goldman, April 29, 

 1911. Original number 21101. 



General characters. — Resembling A. griseimemhra, but general 

 color more buffy, less grayish ; skull broader and differing in numer- 

 ous details ; dentition heavier. 



Color. — General shade of upper parts, limbs and upper base of 

 tail near wood brown (Ridgway, 1912) with a buffy suff'usion, this 

 color more or less heavily overlaid with russet and black along 

 median line of back ; head marked with narrow black lateral lines 

 converging to a point on back of neck, and a black median frontal 

 line extending from between eyes to crown ; white spots above and 

 below eyes ; sides of neck grayish in some specimens ; under parts 

 light ochraceous-buff ; feet blackish ; proximal third of under side 

 of tail usually stained with chestnut, the distal two-thirds black all 

 round. 



Skull. — Similar in general size to that of ^. griseimemhra, but 

 broader, the greater breadth most noticeable in the braincase ; inter- 

 orbital region more depressed, materially altering the facial angle; 

 frontals less extended posteriorly between parietals ; parietals joined 

 by a longer suture owing to lesser posterior development of frontals ; 

 supraoccipital reaching farther upward in a wedge-shaped extension 

 between parietals ; zygomatic portion of jugal heavier ; audital bullae 

 less inflated in front of meatus ; mandible broader and heavier, the 

 angle more everted ; molariform teeth heavier. 



Measurements. — Type: Total' length, 683 mm.; tail vertebrae, 

 400; hind foot, 90. Average of two adult female topotypes: 

 637 (620-654) ; 357 (325-390) ; 85.5 (83-88). An adult male from 

 Boca de Cupe: 670; 360; 90. Skull (type) : Greatest length, 60.9; 

 condylobasal length, 47.2 ; zygomatic breadth, 37.5 ; breadth between 

 outer sides of orbits, 43.3; postorbital breadth, 31.5; mastoid 

 breadth, 33.8 ; interorbital breadth, 5.2 ; palatal length, 17.5 ; maxil- 

 lary tooth row, 18.3. 



