INSECT ORDERS 



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of silk while most butterfly larvae attach themselves by a thread of silk 

 to a twig and the outer body covering hardens to form a chrysalis which 

 serves as their pupa case. 



1. Butterflies. 



a. Skippers. Stout bodied, somewhat moth-like and spin a silk 

 cocoon. 



b. Monarchs. The common brown and yellow spotted butterfly. 



c. Sulfur butterflies. Many small forms, yellow and white in 

 color. 



d. Swallowtails. These have a projection from the posterior end 

 of the hind wings and include some of the most beautifully col- 

 ored butterflies. 



e. Four-footed butterflies. The front legs are small and practi- 

 cally useless as legs so they seem to have only two pair of legs. 



f. The hairstreaks. These are small blue, red, and copper col- 

 ored butterflies that have fine streaks of hair on their wings. 



Courtesy General Biological Supply House 



Fig. 17.12. The clothes moth, adult and larva. The little wormlike larva, no more 

 than a quarter of an inch long, is the culprit that does all the damage to stored woolens, 



furs, feathers, etc. 



2. Moths. The list of moths is so extensive that space will not per- 

 mit a listing of even the most important of the group. The larvae are 

 frequently called worms ; silk worms, bag worms, army worms, measur- 

 ing worms, and tomato worms are a few of these. The clothes moths 

 might be mentioned because of the great destruction that they do to 

 stored clothing and the great expense of protection from them. The 

 adult moth lays its eggs on the clothing and the larvae do the damage. 



