ADVERTISEMENT 



The scientific publications of the National Museum include two 

 series, known, respectively, as Proceedings and Bulletin. 



The Proceedings series, begun in 1878, is intended prittiarily as a 

 medium for the publication of original papers, based on the collections 

 of the National Museum, that set forth newly acquired facts in 

 biologj^, anthropology, and geology, with descriptions of new forms 

 and revisions of limited groups. Copies of each paper, in pamplilet 

 form, are distributed as published to libraries and scientific organiza- 

 tions and to specialists and others interested in the different subjects. 

 The dates at which these separate papers are published are recorded 

 in the table of contents of each of the volumes. 



The present volume is the eighty-second of this series. 



The series of Bulletins, the first of which was issued in 1875, con- 

 tains separate publications comprising monographs of large zoological 

 groups and other general systematic treatises (occasionally in several 

 volumes), fauna! works, reports of expeditions, catalogs of type speci- 

 mens and special collections, and other material of similar nature. 

 The majority of the volumes are octavo in size, but a quarto size 

 has been adopted in a few instances in which large plates were regarded 

 as indispensable. In the Bulletin series appear volumes under the 

 heading Contributions from the United States National Herbarium, in 

 octavo form, published by the National Museum since 1902, which 

 contain papers relating to the botanical collections of the Museum. 



Alexander Wetmore, 

 Assistant Secretary, Smithsonian Institution. 



Washington, D.C, March 27, 1934. 

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