156 



Psyche 



[October 



layer of white blotting paper is placed, completely covering the 

 bottom of the cage. A narrow strip of this paper should be sewed 

 to the large blotter in such a position as to extend through the hole 

 in the bottom of the cage into a vessel beneath which contains 



Fig. 1. Parasite breeding box (original). 



water. The strip of blotter takes up the water from the container 

 and keeps the large blotter which lies in the bottom of the cage 

 moist at all times. Four legs of a convenient height are attached 

 to the corners of the cage and placed in cups to keep away ants 

 and mites. These legs were 3| inches long in the cage used in this 

 work. A small amount of damp straw is then placed in the cage 

 on the blotter. 



When the cage is in readiness the parasites, either in the adult 

 or pupal stage, are introduced. If adult parasites are put into 

 the cage the pupre from which they emerged should always accom- 

 pany them in order to furnish protection and food. Unparasitized 



