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NATURE-STUDY REVIEW 



[15:7— Oct., 1919 



color. The caterpillars of this species do not invariably fasten 

 the petiole of the leaf to the twig, but make the cocoon within 

 the leaf and drop to the ground when the leaf falls. 



The Cynthia {Philosamia cynthia) 



This beautiful moth is an Asiastic species; it is very large and 

 olive green in color with lavender tints and white markings; 

 there are white tufts of hairs on the abdomen. It builds its cocoon 

 like the promethea fastening the petiole to the twig. It lives 



Promethea cocoons, one cut open to show the pupa. 



upon the ailanthus tree, and is found in our State only in the 

 region about New York City, where the ailanthus has been in- 

 troduced as a shade tree. 



The Polyphemus {Telea polyphemus) 



This large, yellowish -brown moth is the one of all our species 

 of American silk-wonns which would be used for the production 

 of silk if we were deprived of the product of the Chinese species. 



