J^fatuzal P€iotoru of th& ijlacf, Worm. 



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By WILLIAM DANDRIGE PECK, 



Member o//^ Ac ric ulturalW Historic a lSoc ie riEs,£f A.A.S. 



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datura nvfquam magis in minimus tota (fl* 



PLIN. LIB. XI. CAP. 2. 



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Addrejfcd to Jonathan Mason, Efq. Correfponding 

 Secretary to the Massachusetts Agricultural 

 Society. 



i 



SIR, 



N every branch of agriculture, and particularly 

 that which comprifes gardening, we cannot but 

 take notice of infect which inhabit the plants we raife : 

 The variety of trees which you cultivate, muit have pre - 

 fented to your obfervation many infefts, that the dili- 

 gence of your gardener is fcarce able to repel. 



Most infe&s, from the time of their being excluded 

 from the egg, till they ceafe from feeding, wear a different 

 form from that which they put on in their perfect ftate. 

 The name of Larva, has been given to the form under 

 which they firft appear, and in which they are mod injuri- 

 ous to trees and plants. At the termination of this firft: 

 period, they become contracted, fome before, and others 

 after, they have formed around them a covering, with ma- 

 terials furnifhed by themfelves. In this fee and period 

 they have received the name of Pupa and Chryfalis. In 

 this ftate the infect remains, till every part of its new form 

 has acquired its full growth, and at the end of this period 

 it leaves its narrow prifon, and may be figuratively laid to 

 have arrived at the age of puberty. 



Caterpillars 



