g6 CECONOMY 



other things neceffary to fatisfy their natural 

 wants j for them other, foon after fhe has laid her 

 ecrgs, dyes, and were fhe to live fhe would not 

 have it in her power to take care of her young. 

 Butterflies^ moths^ fome beetles^ wevilsy 

 lugs^ cuckow-fpit infe^ls^ gall-infe^Sy tree 

 hugs, &c. lay their eggs, on the leaves of 

 plants, and every different tribe choofes its 

 own fpecies of plant*. Nay there is fcarce any 

 plant, which does not afford nourifhment to 

 fome infea ; and flill more, there is fcarcely 

 any part of a plant, which is not preferred by 

 fome of them. Thus one infe6t feeds upon the 

 flower ; another upon the trunk -, another up- 

 on the root-, and another upon the leaves. But 

 we cannot help wondering particularly, when 

 we fee how the leaves of fome trees, and plants, 

 after eggs have been let into them, grow into 

 galls; and form dwellings, as it were, for 

 the young ones, where they may conveniently 

 live. Thus when xht gall-infe5l called cynips^ 

 Fn. 947. has fixed her eggs in the leaves of 

 an oak, the wound of the leaf fwells, and a 

 knob like an apple arifes, which includes and 

 nourifhes the embryo. 



♦ Vid. Syft. Nat. Edit. 10. Fauna Suecica ; and Hofpita 

 Infedorum Flora Amxii. Academ. vol. 3. 



When 



