Publications of the Boston Society of Natural History. 



Memoirs, issued in illustrated parts of quarto size, averaging one 

 hundred and thirty pages annually, at $4.00 per part. Each Me- 

 moir may be obtained separately. 



Prockedings, issued in quarterly parts of octavo size, averaging 

 four hundred pages to a volume, at $4.00 per volume. 



Occasional Papers. I. The Entomological Correspondence of 

 Dr T. W. Harris, with portrait and four plates. Cloth. $5.00. 



II. The Spiders of the United States, by Dr. N. M. Hentz, with 

 twenty-one plates. Cloth, $3.50 ; paper, $3.00. 



Address EDWARD BURGESS, 



Secretary. 



