632 THE AMERICAN NATURALIST. [VoL. XXXV. 
Lepus incitatus nob. ; i ; i ; I specimen 
Dasyprocta callida nob. . i ; > 6 specimens 
Loncheres labilis nob ; 3 I 
Proechimys burrus nob. . ‘ : à ; 51 « 
Zygodontomys seorsus nob. : i : ; 68 ks 
Mus musculus Linn. à : i A : I Specimen 
Mus rattus rattus Linn. . : A 
Mus rattus alexandrinus (Geoft.) 
Vampyrops helleri Peters i 
Hemiderma brevicaudum (Wied.) 
Marmosa fulviventer sp. nov. 
Four specimens, taken between April 28 and May 8. 
Type: No. 8435, adult 2, Bangs Collection, Museum of 
Comparative Zoólogy, collected April 28, 1900. 
Characters: Nearest to the form of the Marmosa murina 
series from the Santa Marta region of Colombia, — M. mitis 
Bangs. Differing in being smaller; ear smaller; fur shorter, 
harsher, less silky; color, above more fulvous, less olivaceous, 
brown; under parts wholly fulvous, darkest on the sides (in 
AM. mitis the under parts are yellowish-white) ; skull similar. 
Color: The usual black facial ‘markings, rest of upper parts 
between cinnamon and tawny-ochraceous; upper surface of 
arms, sides of neck, and sides, much brighter, more -ochra- 
ceous-rufous ; under parts strong buff, shading into ochraceous- 
buff on lower sides and on under surfaces of arms and legs, 
the fur unicolor except on lower sides, where it is pale gray 
basally ; tail dusky, paler below than above; feet and hands 
dull grayish-white. 
MEASUREMENTS. 
Bec 
EAR FROM 
ToTaL AI no 
NUMBER. SEx. TRES VERTEBRÆ.| FooT. 
8435 | d adult type 330 175 
8436 | Q9 “ topotype 325 ie 
8437 | “cc i 340 17 5 
8438 | ĝ old adult Pere head & body, 170 
