Bui. 91 , Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate XXVI. 



Fig. 1.— Riley Rearing Cages as Used at Gipsy- 

 Moth Parasite Laboratory. (Original.) 



Fig. 2.— Interior of One of the Laboratory Structures, Showing Trays Used in 

 Rearing Apanteles lacteicolor in the Spring of 1909. (Original.) 



