ADVERTISEMENT 



The scientific publications of the National Museum include two 

 series, known, respectively, as Proceedings and Bulletin. 



The Proceedings, begun in 1878, are intended primarily as a medium 

 for the pubhcation of original papers, based on the collections of the 

 National Museum, that set forth newly acquired facts in biology, 

 anthropology, and geology, with descriptions of new forms and 

 revisions of limited groups. Copies of each paper, in pamphlet 

 form, are distributed as pubhshed to hbraries and scientific organiza- 

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



The dates at which these separate papers are pubhshed are recorded 

 in the tables of contents of each of the volumes. 



The present volume is the hundred and fifth of this series. 



The Bulletin, the first of which was issued in 1875, consists of a 

 series of separate publications comprising monographs of large 

 zoological gi'oups and other general systematic treatises (occasionally 

 in several volumes), faunal works, reports of expeditions, catalogs of 

 type specimens, 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 jrom the United States National 

 Herbarium, in octavo form, pubhshed by the National Museum since 

 1902, which contain papers relating to the botanical collections of the 

 Museum. 



Remington Kellogg, 

 Director, United States National Museum. 



