64 



FARM SPIES 



(After Smith, N. C. 

 Exp. Sta.) 



working their way out of the eggshell at hatching 

 time. When the egg has been pushed into place, 

 the mother seals the opening of the 

 cavity and that hides the egg and 

 young grub from enemies that might 

 be lurking about the corn." 



"You mean to say that the little 

 FIG. 36. "They white grubs you find in the corn are 



are white, hump- 

 backed, and leg- the young of the black weevils? 



asked Sam Dixon. 



"Most of the grubs you find around here are/' 

 the entomologist replied, "but there are a number of 

 white grubs in corn that 

 do not make weevils. You 

 can tell the weevil grubs 

 without any trouble be- 

 cause they are white, hump- 

 backed, and legless. The 

 grubs eat the inside of the 

 grain, and when they 

 become full grown they 

 change to a quiet or resting- 

 stage, called pupa, and from 

 this pupa the full-grown 

 weevil comes. In warm 

 weather the time required 

 from egg to full-grown insect is from five to seven 

 weeks, but in cool weather a longer time is required." 



FIG. 37. "The grubs eat the 

 inside of the grain." 



