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 Zoological 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, Oiyzo- 

 mys tectus Thomas, Proechimys centralis chiriquinus Thomas, Dasyp- 

 terus ega panamensis Thomas, Artibeus watsoni Thomas and Promops 

 nanus Miller, all from Bogaba, while Sciurus melania (Gray) was named 

 from Point Burica, Costa Rica, just north of Chiriqui, and Galera Bar- 

 bara biologice (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 ivatsoni, and Promops nanus. 



In the present paper I describe as new one genus, Synt/teosciurus, 

 and fourteen species and four subspecies : — Tayassu crusnigrum, Sciuriis 

 cestuans chiriquensis, Sciurus browni, Syntheo sciurus brochus, Megadon- 

 tomys Jlavidus, Peromyscus cacabatus, Nyctomys nitellinus, Sigmodon 

 austerulus, Oryzomys devius, Oryzomys vegetus, Reithrodontomys aus- 

 tralis vulcanius, Reithrodontomys creper^ Akodon teguina 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. 



