REPORT OF ASSISTANT SECRETARY. 55 



The Coleoptera of Kansas and Eastern New Mexico. By John L. 

 Leconte, M. D. Pages 66, and three plates. Quarto. 



Observations on Terrestrial Magnetism in Mexico, conducted under 

 the direction of Baron Von Miiller, with notes and illustrations of the 

 volcano Popocatapetl and its vicinity. By August Sonntag. Pages 

 92, and one plate. Quarto. 



Observations on Certain Storms in Europe and America, in De- 

 cember, 1836. By Elias Loomis, LL.D., professor of natural phi- 

 losophy in the University of the city of New York. Pages 28, and 

 thirteen plates. Quarto. 



In addition to the preceding publications, the following are in an 

 advanced stage of printing, and will be ready for distribution in a 

 short time : 



Catalogue of the Described Lepidoptera of North America. By 

 Rev. Dr. John G-. Morris. Octavo. 



Check Lists of the Shells — land, fresh water, and marine — of North 

 America. Octavo. 



Meteorological Observations made at Providence, Rhode Island. 

 By Prof. A. Caswell. Quarto. 



Meteorological Observations made near Washington, Arkansas. By 

 Dr. Nathan D. Smith. Quarto. 



New Edition of the List of Foreign Institutions in Correspondence 

 with the Smithsonian Institution. Octavo. 



Circular in reference to the collection of facts relating to the grass- 

 hopper tribes of North America. Octavo. 



Circular in reference to the collecting of nests and eggs of North 

 American birds. Octavo. 



Circular in reference to the collecting of North American shells. 

 Octavo. 



EXCHANGES. 



As in previous years, a continuous increase and expansion of ope- 

 rations has taken place in this department. The annexed tables will 

 give a better account of their magnitude than any general remarks 

 on the subject. It will be sufficient to say that the number of insti- 

 tutions and individuals in the United .States availing themselves of 

 the Smithsonian facilities now embraces nearly all those publishing 

 works of a scientific and literary character. 



The expenses of the system of exchanges conducted by the Insti- 

 tution have, of course, increased with the expansion of operations, 

 and but for the free facilities so generously accorded by various par- 

 ties would have arisen to such an amount as to render it necessary to 

 call on each of the institutions benefited for a share of the cost. 

 This has not yet been done, except in the case of the United States 

 Coast Survey, which has greatly exceeded all the rest in the bulk of 

 its transmissions; but it may soon be required from other parties. 



The thanks of the Smithsonian Institution for free freights of pack- 

 ages containing exchanges and specimens of natural history are espe- 

 cially due to the following companies: 



