SPAIN. 



The Royal Academy of Sciences, Madrid. 



SWITZERLAND. 



The Philosophical and Natural-History Society, Geneva. 

 The Canton de 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 New- York Academy of Sciences, New York. 

 The Academy of Natural Sciences, Philadelphia. 

 The American Philosophical Society, Philadelphia. 

 The Entomological Society, Philadelphia. 

 The Peabody Academy of Sciences, Salem, Mass. 

 The Smithsonian Institution, Washington, D.C. 

 The United- States Geological Survey, 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 retm-n 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 hy 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 Hjlnovee SaaARE, London, W., 



April, 1892. 



