18 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
The forms from the top of the Volcano are very different from those of 
the lowlands and foot-hills. In my paper in the Proceedings of the 
New England Zodlogical Club I give extracts from Mr. Brown’s itiner- 
ary, which, though of interest to mammalogists as well as ornithologists, 
need not be repeated here. 
Mr. Brown took the altitudes with an aneroid. 
The mammals that have been described from Chiriqui are as follows: 
Caluromys laniger pallidus Thomas, Tylomys watsoni Thomas, Oryzo- 
mys tectus Thomas, Proechimys centralis chiriquinus Thomas, Dasyp- 
terus ega panamensis Thomas, Artibeus watsoni Thomas and Promops 
nanus Miller, all from Bogaba, while Sccurus melania (Gray) was named 
from Point Burica, Costa Rica, just north of Chiriqui, and Galera bar- 
bara biologie (Thomas) was founded on a specimen from Calovevora, 
Veragua, Panama, just south of Chiriqui. Mr. Brown secured speci- 
mens of all of these except Oryzomys tectus, Dasypterus ega panamensis, 
Artibeus watson, and Promops nanus. 
In the present paper I describe as new one genus, Syntheosciurus, 
and fourteen species and four subspecies : — Tayassu erusnigrum, Sciurus 
estuans chiriquensis, Sciurus browni, Syntheosciurus brochus, Megadon- 
tomys flavidus, Peromyscus cacabatus, Nyctomys nitellinus, Sigmodon 
austerulus, Oryzomys devius, Oryzomys vegetus, Reithrodontomys aus- 
tralis vuleanius, Reithrodontomys creper, Akodon tequina apricus, Ako- 
don xerampelinus, Macrogeomys cavator, Macrogeomys pansa, Heteromys 
repens, Agouti paca virgatus. 
The systematic sequence is that of Miller and Rehn in their recent 
list. All the measurements are in millimeters, and except the skull 
measurements, which are mine, are those of the collector. Color names 
are according to Ridgway’s nomenclature. As descriptions of skulls are 
frequently inadequate, I give figures, from the drawings of Dr. J. C. 
McConnell, in all cases of importance. 
In the identification of the species I have been assisted by Mr. Gerrit 
S. Miller, Jr., Mr. E. W. Nelson, and Mr. W. H. Osgood, to all of whom 
I express my sincerest thanks. Dr. J. A. Allen, of the American 
Museum of Natural History, and Dr. C. Hart Merriam, of the United 
States Biological Survey, have most kindly loaned specimens that were 
of the utmost importance. 
