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



Plate I. 



Longicorn Beetle, Moneilema crassum, an Important Enemy of Prickly Pear. 



Adults feed on exterior of joints of the cactus, while the larvae destroy the interiorof both 



joints and stems. Enlarged. (Original.) 



