No. 3. — SYSTEMATIC RESULTS OF THE STUDY 



OF NORTH AMERICAN LAND MAMMALS 



DURING THE YEARS 1901 AND 1902. 



BY GERRIT S. MILLER. JR., AND JAMES A. G. REHN. 



Progress in the study of the North American mammal fauna ' 

 has been exceptionally rapid during the years 1901 and 190'2. So 

 great an advance in this field has probably never before been made 

 in a like period, even during the remarkable activity of the preceding 

 twelve years. Since 1900 there has been published the first general 

 work on North American mammals subsequent to that of Baird ; 

 many changes in nomenclature have been found necessary, and the 

 elaboration of material has resulted in the discovery of over 300 

 forms unknown two years ago. 



To present a summary of this work, much of which has been 

 issued in short special articles, is the object of this paper. So far 

 as possible all personal opinion is excluded, and the facts are stated 

 with no other end in view than that of history. While this method 

 entails occasional difficulties and apparent inconsistencies, it is 

 undoubtedly preferable to any attempt at a critical treatment of the 

 subject that could now be made. 



A word of explanation in regard to the form adopted. The 

 entries are made in the order followed in our Systematic results of 

 the study of North American land mammals to the close of the 

 year 1900 (Proc. Boston soc. nat. hist., vol. 30, p. 1-352, Decem- 

 ber 27, 1901). All names recorded there and rejected during the 

 years 1901 and 1902 are printed in italics, followed, except in case 

 of elimination, by the current name. This is in heavy faced type. 

 Additions are entered in the same type as other accepted names, 

 but are numbered. 2 The system of citation is the same as that in the 

 earlier paper, but duplication of references there published is as far 

 as possible avoided. The members of genera revised since 1900 are 



1 As more natural than the Panama Railroad, the boundary between Panama 

 and Cauca is here adopted as the southern limit of this fauna. 



- Among these are included three, Odocnileus virgultis. Proechimys centralis 

 panamensis, and Ochotona minimus inadvertently omitted from the original 

 paper. 



