DATES OF PUBLICATION. 



This work was originally Issued in twelve parts, which were published as follows : — 



Part I, containing pages 1-40, 105-208, plates 1, 14, 18, 46, 52, 67, 70and the Physical 

 map, November 1, 1888. 



Part II, containing pages 41-88, 209-304, plates 2, 19, 38, 43,62, 78,83andthe Faunal 

 map, December 1, 1888. 



Part III, containing pages 305-448, plates 11, 20, 33, 39, 53, 71, 74 and the map of the 

 White Mountains, January 1, 1889. 



Part IV, containing pages 449-592, and plates 3, 16, 21, 22, 34, 54, 64 and 79, Febru- 

 ary 1, 1889. 



Part V, containing pages 593-736, plates 4, 23, 40, 55, 61, 68, 75 and the portrait of 

 Abbot, March 1, 1889. 



Part VI, containing pages 737-880, and plates 5, 12, 24, 25, 35, 44, 72 and 81, April 1, 

 1889. 



Part VII, containing pages 881-1048, plates 6, 26, 27, 41, 47, 56, 82 and the portrait of 

 LeConte, May 1, 1889. 



Part VIII, containing pages 89-104, 1049-1216, plates 7, 13, 28, 45, 57, 65, 73 and the 

 map of the distribution of Pieris rapae, June 1, 1889. 



Part IX, containing pages 1217-1400, plates 8, 29, 36, 48, 58, 69, 77 and the portrait 

 of Harris, July 1, 1889. 



Part X, containing pages 1401-1552, and plates 15, 17, 30,49, 59, 66, 85 and 87, August 

 1, 1889. 



Part XI, containing pages 1553-1774, and plates 9, 31, 37, 45, 50, 76, 80 and 88, Sep- 

 tember, 1, 1889. 



Part XII, containing pages i-xxiv of Vol. I, i-xii of Vol. II, i-viii of Vol. Ill, pp. 

 1775-1958, and plates 10, 32, 42, 51, 60, 84, 86 and 89, October 1, 1889. 



