88 BANGS — SANTA MARTA MAMMALS eee 
forms that I had considered (with Dr. Thomas’s aid) not worthy 
of separation have lately been described as distinct by Dr. J. A. 
Allen (Bull. Amer. Mus. N. Hi, XTi, 195-218). I regret that i 
cannot agree with him in regard to them, although it is possible 
that some of them may prove eventually to be slightly different 
from previously named species. 
The mammalian fauna of the Santa Marta region is very 
similar to those of both Bogota and Merida, Venezuela, and some 
of the small species are common to all three regions, apparently 
without variation. It has been Dr. Thomas’s experience, work- 
ing with far more material (that is, specimens from a greater 
number of localities) than any other mammalogist has ever had, 
that the tropical forms of northern South America have extensive 
ranges, over which they vary but little, and that they ascend the 
mountain-sides to 7000 or 8000 feet without change, being often 
more numerous in the lower parts of the mountains than in the 
lowlands. I have not had access to enough material to decide 
this question for myself, but in one instance where Dr. Thomas 
sent me a specimen to compare with mine, that of the big 
Oryzomys* of the region, it is certainly so. In other cases I abide 
by Dr. Thomas’s careful comparisons made between my speci- 
mens and those in the British Museum from Merida, Venezuela, 
Bogota, etc. 
Many of the species of small mammals that are represented in 
large series show a great amount of individual variation in color, 
apart from season, sex or altitude. I believe, however, that this 
variation in color is really not so much individual as it appears to 
be. The moult is not restricted to any particular season, and 
the differences in color are probably due, to a great extent, to the 
length of time the coat has been worn. 
Mr. Gerrit S. Miller, Jr., has identified the bats for me (except 
one lot that I received last autumn), and has named one new 
species from among them. He has also, with great kindness, 
helped me prepare the list of bats that I give here. 
Following is a list of the mammals collected by Mr. W. W. 
Brown, Jr., in the Santa Marta region of Colombia. 
1Oryzomys meridensis Thomas, Merida, Venezuela = O. childi Thomas, Bogota = O. macult- 
venter Allen, Santa Marta district. 
