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, 10; each covering a period of 
three years, $5.00 each. 
Volumes 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, 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%. 
A set of all the volumes available (39 in all) will be sold for 
$77.00. 
All orders should be addressed to 
F. M. CARPENTER, Associate Editor of Psyche, 
Biological Laboratories, 
Harvard University, 
Cambridge, Mass. 
