Mammalia of Southern Brazil. l^J 
guay River, in the western centre of the province, in about lat. 28*' 
south. After a residence there of several months, Mr. Smith and 
party proceeded north-west to the interior province of Matto Grosso, 
ascending the Paraguay River to Cuyaba. From Cuyaba the party 
went about thirty miles to the north-eastward, to the little village of 
Chapada, where they remained for months. This locality was es- 
pecially favorable for the objects of the expedition, being on the 
boundary line between the great plains to the south and the forest- 
covered mountains on the north, and at the heads of the drainage 
of the Paraguay to the south, and of the Xingu tributary of the Am- 
azon on the north, at about lat. \^° S. 
The difference in the characteristics of these localities is easily 
observable in the collections obtained from them. I have already 
published reports on the Batrachia and Reptilia from both localities,^ 
and the present report embraces the Mammalia. The insects and 
birds are in the Museum of Natural History, Central Park, New 
York. Researches on the Mammalia of these regions have been al- 
ready made by Hensel^ and Von Jhring in Rio Grande do Sul, and 
by Natterer at Cuyaba. The collections of the last-named explorer 
are worthily described by Wagner of Munich, and a full report on 
them has been made by Von Pelzeln. t of Vienna. Sixty-five spe- 
cies were obtained by Mr. Smith, most of them represented by many 
specimens, and five of the species appear to be new to science. The 
distribution of these as to locality will be stated at the close of the 
paper. 
MARSUPIALIA. 
1. DiDELPHYs MARSUPiALis AZARiE Temm. (Thos.) 
Two skins with skeletons from Sao Joao; three skins with skele- 
tons from Chapada: one skin with skull from Sao Joao; two skins 
from Chapada, two from Sao Joao, and four without locality; also 
one skeleton from Chapada, two skulls from do, three skulls from 
Sao Joao, and two skulls and a skeleton of unknown localities. 
2. DiDELPHYS MARSUPIALIS AURiTA Wied. (Thomas). 
One skin from uncertain locality. Although fully grown, the 
long dorsal hairs and the ears are perfectly black, and there are 
large spots above the eyes. Belly light brown. 
