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 OP AMERICA. 



The Boston Society of Natural History, Boston. 



The Museum of Comparative Zoology, Cambridge, Mass. 



The Field Columbian Museum, Chicago. 



The Illinois State Laboratory of Natural History, Illinois. 



The American Journal of Science, Newhaven. 



The American Museum of Natural History, New York. 



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 Fish Commission, Washington, D.C. 



The United-States Geological Survey, Washington, D.C. 



The United-States National Museum, Washington, D.C. 



WEST INDIES. 



The Institute of Jamaica, Kingston. 



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. 



3 Hanover Square, London, W., 

 April, 1 90 1. 



By order of the Council, 



P. L. SCLATER, 



Secretary. 



