BACK VOLUMES OF PSYCHE 
The Cambridge Entomological Club is able to offer for sale 
the following volumes of Psyche. Those not mentioned are 
entirely out of print. 
Volumes 2, 3, 4 , 5, 6, 7, 8, 9, each covering a period of three 
years, $5.00 each. 
Volumes 10, 12, 14, 17, each covering a single year, $1.00 each. 
Volumes 18, 19, 20, 21, 22, 23, 24, 25, 26, each covering a single 
year, $1.50 each. 
Volumes 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 
42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, each covering a single 
year, $2.00. 
Orders for 2 or more volumes subject to a discount of 10%. 
Orders for 10 or more volumes subject to a discount of 20%. 
All orders should be addressed to 
F. M. Carpenter, Associate Editor of Psyche, 
Biological Laboratories, 
Harvard University, 
Cambridge, Mass. 
