328 Bulletin American Museum of Natural History. [Vol. XX, 



ridge; anterior palatine foramina relatively long and narrow, and 

 narrow posterior nares. 



Total length, 248 mm.; head and body, 127; tail vertebras, 121; 

 hind foot, 25 (without claws, 23); ear (from crown, dry), 12. Skull, 

 total length, 32; basilar length, 25; zygomatic breadth, 17; interor- 

 bital breadth, 5.6; greatest width of braincase, 14; nasals, 10x6; 

 palatal length, 14; palatine foramina, 6x2; upper toot hrow, 5. 



Oryzomys klagesi is not closely related to any species known 

 to me. It is a robust form, with the tail rather shorter than 

 the body, broad stout feet, rather small ears, and long soft 

 pelage. The skull is broad and very flat, with a short, thick 

 rostrum, and very heavy supraorbital ledges, although the 

 teeth are almost unworn. In coloration it is remarkably like 

 O. speciosus All. & Chap., from Trinidad, except for the darken- 

 ing of the facial portion of the head. It is, however, a larger, 

 more robust species, with much heavier and broader skull 

 and shorter tail, and rather long and narrow instead of broad 

 and short palatine foramina, and narrower posterior nares. 



Oryzomys tenuipes, sp. nov. 



Type, No. 21330, ? , Merida (alt. 1630 m.), Venezuela, Feb. 14, 1903; 

 coll. S. B. Gabaldon. 



In texture of pelage and coloration similar to O. stolzmanni Thomas, 

 from Huambo, northern Peru, but much smaller and more delicate, 

 with much narrower and slenderer feet, relatively shorter tail, slen- 

 derer rostrum, and shorter posterior nares. 



General color above dark brown, with a tinge of rufous; sides 

 lighter and grayer with a slight fulvous tinge; lower parts buffy 

 whitish; ears blackish externally on the anterior border, in contrast 

 with the color of the surrounding parts ; feet very narrow and slender, 

 upper surface of the fore feet yellowish brown, of the hind feet buffy 

 gray; tail pale brown, apparently naked but on close inspection 

 showing minute hairs, increasing in abundance apically until near the 

 tip they nearly conceal the annulations and form a slight pencil. 



Total length, 180; head and body, 80; tail vertebras, 100; hind 

 foot (with claws), 22; ear, 12. Skull, total length, 22.5; basilar 

 length, 17; zygomatic breadth, 11.4; greatest width of braincase, 10; 

 interorbital breadth, 3.5; nasals, 7.2 x 2; palatine foramina, 4X 1.3; 

 palatal length, 8.5; upper toothrow, 3. Interorbital region flat, with 

 an angular border and slight parietal ridges; palatine foramina ter- 

 minating on a line with the front molars, posterior nares very short, 

 posterior border of palate deeply hollowed, extending well beyond the 



