2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



neck and flanks ; under parts between cream buff and pinkish buff, 

 this color extending to roots of hairs ; ears brown ; orbital area 

 black ; fore feet brownish to base of toes' ; hind feet and toes of fore 

 feet dull whitish ; longer hairs at base of tail on under side tawny 

 ochraceous ; tail light brownish. 



Skull. — Similar in general to that of chapmmii, but rostrum nar- 

 rower ; nasals less prolonged posteriorly ; audital processes of alisphe- 

 noids decidedly smaller ; teeth slightly smaller. Differing from that 

 of riiotonica in narrower rostrum and more strongly developed sub- 

 raorbital ridges. 



Measurements. — Total length, 385 mm.; tail vertebrae, 215; 

 hind foot, 28. Skull (type): Greatest length, 43.5; condylobasal 

 length, 42.7; zygomatic breadth, 23.7; nasals, 20 x 5.1 ; interorbital 

 breadth, 6.2; palatal length, 21.5; upper molariform toothrow, 13.8; 

 three anterior molariform teeth, 6.2. 



Remarks. — A single specimen of this large pale colored species 

 was trapped in an old banana plantation only a few feet above sea 

 level. 



METACHIRUS NUDICAUDATUS DENTANEUS, subsp. nov. 



Type from Gatun, Canal Zone, Panama. No. 172732, male adult, 

 U. S. National Museum (Biological Survey Collection), collected 

 by E. A. Goldman, January 12, 19 11. Original number 20837. 



General eharacters. — -Most closely allied to M. n. colombiamis ; 

 color paler, less tawny ; skull differing in detail. 



Color. — General color of upper parts, including outer sides of hind 

 legs, near wood brown, darkened along back by blackish, the black 

 predominating in a narrow line down middle of rump to tail ; median 

 area on top of head glossy black, this color fading gradually by 

 admixture with lighter hairs along a narrowing line reaching anter- 

 iorly to nose and posteriorly to back of neck ; orbital rings and sides 

 of muzzle blackish ; cheeks, supraorbital spots, and area about ears 

 ochraceous buffy, the color richest about ears ; shoulders suffused 

 with plumbeous, the basal color being darker and showing through ; 

 under parts, including inner sides of limbs, yellowish white ; outer 

 sides of fore limbs grayish, tinged with buffy ; fore feet mainly 

 dusky, becoming abruptly whitish along outer side of tarsus and on 

 toes ; hind feet dull white ; tail dusky above, lighter below, becoming 

 whitish all round near tip. 



Skull. — Similar in general to that of Colombian us, but dentition 

 heavier ; first, second, and third upper molars more deeply emar- 

 ginate externally ; zygomata lighter. 



