84 



ARTHROPODA 



stones and boards, while later it and allied species may be 

 found by digging about the base of any plant which has 



lately been cut off near 

 the surface of the earth 

 Winter is passed in 

 the larval state, and 



FIG. 85. Common cutworm (Agrotis), Nat- pupation OCCUrS in the 

 ural size. , 



ground. 



The cotton-boll worm or corn worm ( Heliothis armiger) in 

 1902 damaged the cotton crop in Texas alone to the extent 



FIG. 87. Army worm, 

 natural size. 



FIG. 86. Cotton-boll worm or corn worm. Two larvaj, 

 pupa, and adult. After Chittenden. 



of four millions of dollars, and in 1893 to the extent of five 

 millions of dollars. It also attacks other plants, especially 

 the ears of sweet corn. The army worm (Leucania uni- 



