286 Mr. O. Thomas on 



Museum collection or as recorded by various authors from all 

 the localities of its wide range have from 2 to 4 inches of the 

 end of the tail white, contrasting markedly with the black of 

 the rest of the tail : but in four specimens from Paramba and 

 one from Cachavi the tail is wholly black, a difference which, 

 slight as it is, seems to entitle the N. Ecuadorean form to a 

 special subspecific name. 



Philander laniger paUidus, subsp. n. 



Essential characters of Ph. I. derbianuSj but much paler and 

 the colour-markings nearly or quite obsolete. 



General colour pale grey throughout, extreme examples 

 being almost white all over, but in other specimens the 

 shoulders, sides of neck, and the middle dorsal region are pale 

 rufous, with an indistinct trace of the grey stripe of Ph. I. der- 

 bianus. Face pale brownish white, the mesial line scarcely 

 perceptible; area below ears whiter. Forearms, scapular 

 region, and sides of hips very pale grey, nearly white; hind 

 limbs also whitish or with a faint trace of the rufous so 

 conspicuous in Ph. I. derhianus. Fur of tail whitish grey, 

 not browner terminally ; naked part only slightly mottled 

 with dark just close to the furry part. 



Dimensions of the type (an old male, measured in the flesh 

 by collector) : — 



Total length 587 millim. ; head and body 289; tail 3<)8 ; 

 hind foot, s. u. 43, c. u. 45 ; ear 32. 



Skull : greatest length 61 ; greatest breadth 35 ; combined 

 lengths of ms}''^ 9. 



Hab. Bogava, Chiriqui, N.W. Panama; alt. 250 m. 



Type collected by Mr. H. J. Watson, October 12, 1898. 

 Six specimens examined, besides one obtained at Santa Ana, 

 Costa Rica, by Mr. C. F. Underwood, in May 1895, and 

 another at S. Jose in 1896. 



This appears to be a pale inornate race of the ordinary 

 brightly marked Ph. I. derbianus of Central America. 



Philander laniger guayanus, subsp. n. 



General colour pale whitish, broadly washed with ferru- 

 ginous, markings nearly obsolete. Face dull white, mesial 

 stripe scarcely perceptible. Neck and back uniform pale 

 rusty, the hairs dull whitish subterminally, their tips bright 

 rusty, richest in the centre of the back ; a very faint indica- 

 tion of the grey stripe on withers. Sides similar to back, 

 but paler, and the underside also faintly washed with rusty. 

 Arms and legs like back, hands and feet paler. Furry part 



