CONTENTS. 



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ARTICLE I. Catalogue of the described Diptera of North America. 

 Prepared for the Smithsonian Institution by R. Osten- 

 Sacken. January, 1858. Pp.112. With Supplement. 



ARTICLE II. Catalogue of the described Lepidoptera of North 

 America. Prepared for the Smithsonian Institution 

 by John G. Morris. May, 1860. Pp. 76. 



ARTICLE III. Classification of the Coleoptera of North America. 

 Prepared for the Smithsonian Institution by John L. 

 Le Conte, M. D. Pp. 302 and 47 wood-cuts. Pp. 

 1—208 published May, 1861; 209—278, March, 1862. 



ARTICLE IV. Catalogue of Publications of Societies, and of other 

 periodical Works in the Library of the Smithsonian 

 Institution, July 1, 1858. Foreign works. 1859. 

 Pp. 264. 



