220 INSECTS IXJUKIOUS TO STAPLE CROPS. 



and conceal itself." These insects are true bugs, sucking 

 their food through a beak, which is bent under the body 

 between the legs when not in use. They are about half 

 an inch long, of a drab color above and greenish or 

 yellowish below. Usually only one bug is found on a 

 plant, so that the best way to ^^I'event the injury is to 

 pick them from the plants, and keep down such weeds as 

 thistles and mulleins, upon which such insects feed, in 

 the adjoining fields. 



Fig. 122. — EuscMsius variolarius. Nymph at left; adult at right- 

 enlarged. (After Howard, U. S. Dept. Agr.) 



INJURING THE *'BUD." 



Bud- worms {Heliothis armiger and rliexim). 



Before the leaves of the tobacco have unrolled they are 

 subject to the attacks of two larvse, known as ^'Bud- 

 worms." Though the adult moths of these two insects 

 are very different in appearance, the larvae are much alike. 



The Corn-worm, Cotton Boll-worm, or Tomato-worm 

 {Heliothis armiger), as it is called in different sec- 

 tions, is well known to all groAvers of these crops 

 and needs no extended description. Corn is the favorite 

 food of these worms, on which they first riddle the leaves 



