S7 

 V. ( 



CONTENTS. 



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ARTICLE I. MONOGRAPHS OP THE DIPTERA OF NORTH AMERICA. Pre- 



Ts/"i >i/ 1 pared for the Smithsonian Institution. f By H. I^OEW. 



Part I. Edited, with additions, by R. OSTENSACKEN. 



April, 1862. Pp. 246, 3 wood-cuts and two plates. 



(141) 



ARTICLE II. MONOGRAPHS OF THE DIPTERA OF NORTH AMERICA. Pre- 

 pared for the Smithsonian Institution. By H. LOEW. 

 Part II. Edited by R. OSTENSACKEN. January, 1864. 

 Pp. 372, and five plates. (171). 



ARTICLE III. LIST OF THE COLEOPTEKA OF NORTH AMERICA. Pre- 

 pared for the Smithsonian Institution. By JOHN L. 

 LECOKTE, M. D. Part I. March, 1863 April, I860. 

 Pp. 82. (140) 



ARTICLE IV. NEW SPECIES OF NORTH AMERICAN COLEOPTEEA. Pre- 

 pared for the Smithsonian Institution. By JOHN L. 

 LECO.STE, M. D. March, 1863 April, 1866. Pp. 180. 



(167) 



