1893.] Allen and Chapman on Trinidad Mammals. 231 



Sixteen adult males, measured before skinning, range in size as 

 follows: Total length, 361 (340-395) mm.; head and body, 

 I 7 I ( T 55- l8 9); tail, 190 (175-218) ; hind foot, 24.4(20-28) ; ear, 

 25 (22-29). Four females measure as follows : Total length, 

 324 (302-365) ; head and body, 148 (132-168) ; tail, 176 (163- 

 197) ; hind foot, 22 (20-24) I ear > 22 ( 2 ~^3-) 



In coloration the variation is chiefly in the brightness of the 

 rufous of the upper parts, which varies from dull grayish brown 

 to quite strong rufous brown, and in the depth of the yellowish 

 white tint below, which varies from buff to ochraceous buff. The 

 younger (at least the smaller) specimens of the series are duller 

 and darker colored above than the larger, older examples. 



This little Opossum was so abundant as to prove a positive 

 source of annoyance. Traps baited with meat were sure to be 

 preoccupied by it, while many trapped specimens of other species 

 were partially eaten by probably this species. 



LIST OF LAND MAMMALS KNOWN FROM TRINIDAD. 



For convenience of reference we here add a list of the land 

 mammals thus far recorded from the Island of Trinidad. It 

 consists of Mr. Thomas's ' Preliminary List,' with the additions 

 made in the present paper. The fourteen species here added are 

 distinguished by an asterisk prefixed to the current number. 



Order PRIMATES. 



Family CEBID^E. 



1. Mycetes, sp. Probably M. seniculus (Linn.). Red Howler. 



2. Cebus, sp. Sapajou. Capuchin Monkey. 



Order CHIROPTERA. 



Family VESPERTILIONID.E. 



3. Vespertilio nigricans Wied. 



4. Thyroptera tricolor Spix. 



