SCALE INSECTS. 



11 



withdrawing sustenance, and using the greater part of this 

 in maturing its progeny. The male jDasses through a third 

 or pupa stage, a quiescent period, from which he emerges 

 with two small transparent wings. These greatly aid him 



CI. 



Fig. 1. — San JosC^ scale: a, pear, moderately 

 infested — natural size; 6, female scale — ■ 

 enlarged. (After Howard, Cir. No. 3, 2d 

 ser., Div. Ent., Dept. Agr.) 



during his brief existence in finding his mates. After his 

 life functions are performed he dies, and his progeny live 

 after him to commit depredations and produce again in kind. 

 Let us take up the circuit of life late in autumn, 

 after cold weather has caused a temporary cessation of ac- 

 tivity. The insect, not yet full grown, passes the winter 

 protected by a waxy scale. In early spring, the exact date 

 varying with the latitude, the males come out from under 

 their winter cover. About May the females mature and 



