ADVERTISEMENT. 



The scientific publications of the National Museum consist of two 

 series — Proceedings and Bulletins. 



The Proceedings, the first volume of which was issued in 1878, are 

 intended primarily as a medium for the publication of original papers 

 based on the collections of the National Museum, setting fortli, newly 

 acquired facts in biology, anthropology, and geology derived there- 

 from, or containing descriptions of new forms and revisions of limited 

 groups. A volume is issued annually or oftener for distribution to 

 libraries and scientific establishments, and, in view of the importance 

 of the more prompt dissemination of new facts, a limited edition of 

 each paper is printed in pamplilet form in advance. The dates at 

 wliich these separate })apers are published are recorded in the table 

 of contents of the volume. 



The present volume is the forty-third of this series. 



The Bulletin, publication of which was begun in 1875, is a series of 

 more elaborate papers, issued separately, and, like the Proceedings, 

 based chiefly on the collections of the National Museum. 



A quarto form of the Bulletin, laiown as the "Special Bulletin," 

 has been adopted in a few instances in which a larger page was deemed 

 indispensable. 



Since 1902 the volumes of the series known as "Contributions from 

 the National Herbarium," and containing papers relating to the botan- 

 ical collections of the Museum, have been published as Bulletins. 



Richard Ratiibun, 

 Assistant Secretary, Smithsonian Institution, 

 In charge of the United States National Museum. 



February 27, 1913. 



