4 
SPAIN. 
The Royal Academy of Sciences, Madrid. 
SWITZERLAND. 
The Philosophical and Natural-History Society, Geneva. 
The Vaud Society of Natural Sciences, Lausanne. 
The Society of Natural Sciences, Neuchatel. 
The Natural-History Society, Zurich. 
UNITED STATES OF AMERICA. 
The Boston Society of Natural History, Boston. 
The Museum of Comparative Zoology, Cambridge, Mass. 
The Field Columbian Museum, Chicago. 
The New-York Academy of Sciences, New York. 
The Academy of Natural Sciences, Philadelphia. 
The American Philosophical Society, Philadelphia. 
The Entomological Society, Philadelphia. 
The Essex Institute, Salem, Mass. 
The Smithsonian Institution, Washington, D.C. 
The United-States Geological Survey, Washington, D.C. 
The United-States National Museum, Washington, D.C. 
The Publications (except in special cases) are sent out direct as 
soon as they are issued. It is requested that they may be ac- 
knowledged by the return of the form of receipt sent with them, 
in order that any mis-delivery may be brought to notice. 
Publications sent in exchange to this Society should be addressed 
to the Librarian at this Office. It is requested that they may be 
sent direct by post, as much delay is caused by their transmission 
through booksellers and in other ways. 
By order of the Council, 
P. L. SCLATER, 
Secretary. 
3 Hanover Sauare, Lonpoy, W., 
April, 1897. 
