Bui. 1 12, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate XI 



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Figs. 1 and 4. — Types of cages in which larval and pupal parasites of the alfalfa weevil were 

 reared in the laboratory. Photograph taken during June, 1911. (Original.) 



Figs. 2 and 3. — Boxes sealed and fitted with glass tubes into which imported parasites emerged and 

 were separated in the laboratory. Photograph taken during May and June, 1911. (Original.) 



Introduction of Parasites of the Alfalfa Weevil. 



