Bui. 50, Bureau of Entomology, U. S. Dept. of Agriculture. 
Plate XVIII, 
Predaceous Enemies of the Bollworm. 
Fig. 1, Polistes anmdaris, a wasp predator^' on the bollworm, and its nest, two-thirds natural size; 
tig. 2, Lycosa riparia with captured bollworm moth, natural size; fig. 3, iJcrmin/in (nn/iistipeimis, 
a robber fly predatory on the bollworm moth, enlarged one-half; fig. 4, jilnllniiliom orcina, 
another robber fly which destroys moths, enlarged one-half; fig. 5, Metapudi/is j'< moratus, cf $, 
known to attack bollworms, enlarged one-half (original). 
