CONTENTS. 



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 ARTICLE I. 



PAGE 



vii. 



Monographs of the Diptera of North America. 

 Part IV. Prepared for the Smithsonian Institu- 

 tion. By R. OsTEN Sacken. January, 1869. 8vo. 

 Pp. 358, 4 plates, and 7 wood-cuts. (219) 



ARTICLE II. Catalogde of the Orthoptera of North America 

 DESCRIBED PREVIOUS TO 1867. Prepared for the 

 Smithsonian Institution. By Samdel H. Scudder. 

 October, 1868. 8vo. Pp. 110. (189) 



ARTICLE III. Land and Fresh-Water Shells of North America. 

 Part I. Pdlmonata Geophila. By W. G. Binnet 

 and T. Bland. February, 1869. 8vo. Pp. 328, 

 and 544 wood-cuts. (194) 



ARTICLE IV. Arrangement of Families op Birds. Adopted pro- 

 visionally by the Smithsonian Institution. June, 

 1866. 8vo. Pp. 8. (210) 



ARTICLE V. Circular to Officers of the Hudson's Bat Company. 

 1860. 8vo. Pp. 6. (137) 



ARTICLE VI. Suggestions Relative to Objects of Scientific In- 

 vestigation in Russian America. May, 1867. 8vo. 

 Pp. 10. (207) 



ARTICLE VII. Circular Relating to Collections in Archaeology 

 and Ethnology. January, 1867. 8vo. Pp.2. (205) 



ARTICLE VIII. Circular TO Entomologists. 1860. 8vo. Pp.2. (178) 



ARTICLE IX. Circular Relative to Collections op Birds from 

 Middle and South America. December, 1863. 8vo. 

 Pp. 2. (168) 



ARTICLE X. Smithsonian Museum Miscellanea. 1862. Pp. 88. 



(164) 



