THE MONTHLY BULLETIN. 



397 



THE RED SCALE. 



The red scale is another destructive enemy of the citrus tree, and 

 is distributed throughout the Southern citrus belt, particularly in San 

 Diego, Orange, Los Angeles, Riverside, San Bernardino and Santa 



Fig. S4. — The red scale, Chi'ysomphahis aurantii, on leaf of orange: twice enlarged. 

 (After Essig, Injurious and Beneficial Insects of California, State Comm. Hort. ) 



Barbara counties. The scale is reddish colored and flat, and the 

 females are from one-sixteenth to one-eighth inch in diameter. The 

 young are usually produced from June to September, or even longer 

 in mild sections. 



Fumigate with hydrocyanic acid gas, using full schedule Xo. 1. 



