308 MINUTES Au. 



122. inftinct, of the animal, and that they are in- 

 TENTHREDO tended by nature for the conveniency of the 

 THETURXEP female in depofiting her eggs. 



When the caterpillar is apprehenfivc of dan- 

 ger, he coils himfelf up in a circular form, 

 putting his head and his tail together. If the 

 plant on which he is feeding be fhook, he 

 immediately coils himfelf up and falls to the 

 ground; where he lies to appearance inani- 

 mate, until he thinks the danger over ; when 

 he unfolds himfelf and foon remounts the 

 plant. 



AUGUST 21. Yefterday morning, going into 

 a field, where fome plants which had been 

 ftripped by the caterpillars, had been left 

 ftanding to wait the effect, (to obferve the pro- 

 grefs thefe plants had made), I perceived fome 

 of the yellow flies among them. Being 

 anxious to procure fome, I went eagerly to 

 ^the purfuit, and found them fo abundant, that 

 in half an hour I caught near forty, notwich- 

 ftanding they were remarkably wild. Their- 

 lalertnefs flruck me ; they being now more dif- 

 ficult to take than I had found them three 

 weeks ago. This led me to the idea that they 

 are the produce of the caterpillars which de- 

 ftroyed the plants above-mentioned; for the 



ground 



