PHYLUM ARTHROPODA — CLASS INSECTA 



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The following are some examples of common species: the mon- 

 arch butterfly, Danails menippe (Hubner), is widely distributed 

 through the United States, parts of Canada, and south into the 

 tropics. This species is typical of the family Danaidae which is one 

 of the nine families of butterflies in this country. 



Fig. 191. — Insects of the order Lepidoeptera. Above, adult female moth of peach 

 tree borer, Aegeria exitiosa; center, cocoon and empty pupal case ; below, adult 

 male moth of peach borer. (Pi-om Sorensen and Knowlton, permission Utah Agri- 

 cultural Experiment Station.) 



Some of the most destructive species of this order are among the 

 moths. The Noctuidae (millers) is a large family of injurious 

 species. The corn-ear worm or cotton bollworm, Heliothis ohsoleta 

 (Fabr.), feeds upon many plants, a few of which are tomatoes, corn, 

 the green bolls of cotton, squash, strawberries, cabbage, and at times 

 alfalfa (Fig. 190). The gooseberry fruitworm, Zophodiu grossulariae 

 Riley, is a pest belonging to the snout moths or Pyralididae. The clear- 



