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



Two Important Scale Insects of Prickly Pear. 



Upper figure, the cottony cochineal insect, Dactylopius cortfusus; lower figure, l>in.<i>i.< cchinocacti 

 cacti. Lower figure enlarged. (Original.) 



