108 



ARTHROPODA 



FIG. 120. -Pea weevil ; a, adult ; 6, larva ; c,pupa. 

 Enlarged five times. After CMttenden. 



season. The pea weevil (Bruchus) is often found in peas 



in its larval state during summer and autumn, as a pupa 



in winter, and in the 

 adult form in late 

 spring, when it comes 

 forth to lay its eggs 

 on the pods of the 

 growing peas. To 

 find the weevil in 

 the fall, soak peas 

 water for a day. 

 This causes most of 



the affected seeds to float. The grain weevil (Calandra) is 



a pest in mills and granaries, devouring the inside of the 



grains of wheat. 

 The cotton-boll 



weevil (Anthono- 



mus grandis) 



threatens to make 



cotton raising a 



very uncertain 



business. The 



pest became so 



troublesome in 



Texas that the 



governor offered 



a reward of fifty 



thousand dollars FIG. 121. Cotton-boll weevil ; a, larva ; 6, pupa ; c, 

 tO any One Who adUlt ' ^tograph enlarged four times. 



should discover a remedy to prevent the ravages of the in- 

 sect, which amounted to twenty millions of dollars annually. 





