Bui. 1 1 3, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate VII. 



Studies of Cactus Insects. 



Fig. 1.— Eggs of Mrtitara jumtoUneelln on spines of Opuntia. Fig. 2.— Eggs of Chelinidca 

 on spine of Opuntia. Fig. 3.— Eggs of Copestylum marginatum on opuntia spines. Fig. 4.— 

 Narnia pallidicornis. (Original.) 



