2IO Bulletin American Museum of Natural History. [Vol. XII, 



Oryzomys villosus, sp. nov. 



Type, No. 15321, $ ad., Valparaiso (alt. 4500 ft.), Santa Marta District, 

 Colombia, April 15, 1899 ; Coll. H. H. Smith. 



Pelage soft, fine, and velvety throughout. Color above yellowish brown, 

 mixed with black, paler and more yellowish on the sides ; below uniform 

 whitish gray, fur plumbeous at base ; ears light brown, large, naked ; tail long, 

 brown, a little lighter below than above, more especially on the proximal half; 

 feet buffy gray. 



Measurements. Type, and only specimen : total length, 275 mm.; tail, 148 ; 

 hind foot, 26, with claws, 28.5 ; ear (in dry skin), 17. 



Skull, total length, 32.6 ; basal length, 26 ; zygomatic width, 17.5 ; mastoid 

 width, 12.4 ; interorbital width, 5.5 ; length of nasals, n ; palatal length, 

 7 ; length of palatal foramina, 5 ; length of upper toothrow, 5.4 ; length of 

 lower jaw (condyle to incisor tips), 21 ; height, condyle to angle, 8.3 ; height 

 at coronoid, 8 ; length of lower toothrow, 6. Skull short, broad, especially the 

 rostral portion ; coronoid low, broad, angular, without the usual prominent 

 backwardly directed point. 



Oryzomys villosus is based on a single adult nursing female, 

 from Valparaiso. Apparently only four mammae were function- 

 ally developed, of which one pair is inguinal and one pair axillar. 

 This is a long-tailed, rather large species, with rather large ears 

 and a remarkably soft, short, velvety pelage throughout. (The 

 pelage, however, seems rather worn.) The skull is short, broad, 

 and massive, with the coronoid very low and broad, forming 

 merely an obtuse angle without a sharp point ; yet the two sides 

 are alike and the structure seems normal. It is apparently nearly 

 related to O. meridensis Thomas, but is smaller, with a relatively 

 longer tail, very much smaller ears, and a quite different colora- 

 tion. It is perhaps still nearer O. vestitus Thomas, also from 

 Merida, from which its smaller size and dissimilar coloration 

 should distinguish it. 



Oryzomys palmarius, sp. nov. 



Type, No. 14733, $ ad., Quebrada Secca, Venezuela, Dec. 10, 1898 ; F. W. 

 Urich. 



Pelage full, long, and soft. Color above yellowish gray-brown, varied with 

 blackish-tipped hairs, passing into pale fawn on the sides ; head and face much 

 grayer than the body ; below dull grayish white, the plumbeous underfur well 

 concealed by the whitish tips ; ears of medium size, brown, thinly-haired ; fore- 

 arm and manus dingy gray, the toes lighter, whitish ; hind foot short for the 

 size of the animal, thinly haired, varying in different specimens from dingy 



